From Steve.Ravet at arm.com Tue May 1 10:55:50 2007 From: Steve.Ravet at arm.com (Steve Ravet) Date: Tue, 1 May 2007 08:55:50 -0700 Subject: [Gmecm] entertainment and comfort bus? Message-ID: Anyone have details on GM's E&C bus? This is used, among other things, to control the remote CD changer from the head unit in the dash via a 9 pin connector. I've gathered that it's UART like but haven't found any information about how messages are formatted on it. --steve ------------------- Steve Ravet ARM steve.ravet at arm.com -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. From mrcad472 at iowatelecom.net Thu May 3 08:48:13 2007 From: mrcad472 at iowatelecom.net (Scott Pearson) Date: Thu, 3 May 2007 08:48:13 -0500 Subject: [Gmecm] entertainment and comfort bus? References: Message-ID: <089a01c78d89$b208ddf0$6401a8c0@DELL3G> I guess the first question is what are you trying to do? I've played with this a little in the Trofeo. It's been several years, but could dig through my notes and see what I have. Scott ----- Original Message ----- From: "Steve Ravet" > Anyone have details on GM's E&C bus? This is used, among other things, > to control the remote CD changer from the head unit in the dash via a 9 > pin connector. I've gathered that it's UART like but haven't found any > information about how messages are formatted on it. From b.shaw at comcast.net Thu May 3 09:00:11 2007 From: b.shaw at comcast.net (Bill Shaw) Date: Thu, 03 May 2007 10:00:11 -0400 Subject: [Gmecm] vehicle stability control system In-Reply-To: <089a01c78d89$b208ddf0$6401a8c0@DELL3G> References: <089a01c78d89$b208ddf0$6401a8c0@DELL3G> Message-ID: <4639EAEB.5050509@comcast.net> Has anyone played with the vehicle stability control system? It looks to me like the functionality is all built into the abs controller, as well as the traction control functionality. If I replace the brake control module (in an '07 Yukon) with one from an '07 pickup truck that does not have traction control or vehicle stability will I be able to defeat the tc and vscs functionality and not set a code in another module? Bill From Steve.Ravet at arm.com Thu May 3 11:25:20 2007 From: Steve.Ravet at arm.com (Steve Ravet) Date: Thu, 3 May 2007 09:25:20 -0700 Subject: [Gmecm] entertainment and comfort bus? In-Reply-To: <089a01c78d89$b208ddf0$6401a8c0@DELL3G> Message-ID: I've been wanting to connect my ipod directly to the radio instead of using the fm transmitter that I have. I was searching for IPOD hacks and came across a product that does exactly that -- the ipod connects as a CD changer and you use the radio buttons to skip forward and back, change playlists, etc. It's $150 but I know it can be done cheaper! That Ipod docking connector has plenty of connections in it -- firewire, USB, and serial, in addition to audio in/out, video out, and some configuration pins. --steve > -----Original Message----- > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Scott Pearson > Sent: Thursday, May 03, 2007 8:48 AM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] entertainment and comfort bus? > > I guess the first question is what are you trying to do? I've > played with this a little in the Trofeo. It's been several > years, but could dig through my notes and see what I have. > > Scott > > ----- Original Message ----- > From: "Steve Ravet" > > > Anyone have details on GM's E&C bus? This is used, among other > > things, to control the remote CD changer from the head unit in the > > dash via a 9 pin connector. I've gathered that it's UART like but > > haven't found any information about how messages are > formatted on it. > > > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. From Robin at FuryWorld.fsnet.co.uk Thu May 3 14:20:19 2007 From: Robin at FuryWorld.fsnet.co.uk (Rob Handley) Date: Thu, 3 May 2007 20:20:19 +0100 Subject: [Gmecm] Shift light load References: Message-ID: <0ad901c78db8$1760fec0$020101c0@gandalf> Anybody know what load can be put on the shift light pin of a '727? I'm using a small dash light ATM, but it's not wonderfully visible so I was thinking of fitting something bigger and higher wattage - as long as it doesn't fry the ECM! Robin From Robin at FuryWorld.fsnet.co.uk Thu May 3 14:18:47 2007 From: Robin at FuryWorld.fsnet.co.uk (Rob Handley) Date: Thu, 3 May 2007 20:18:47 +0100 Subject: [Gmecm] entertainment and comfort bus? References: Message-ID: <0ad801c78db8$1734bea0$020101c0@gandalf> Would it not be easier to connect the earphone o/p to phono inputs on the back of the radio? If this is not possible, I found the cassette interface provided better S/N than the FM transmitter I bought. BR, Robin ----- Original Message ----- From: "Steve Ravet" To: Sent: 03 May 2007 17:25 Subject: RE: [Gmecm] entertainment and comfort bus? I've been wanting to connect my ipod directly to the radio instead of using the fm transmitter that I have. I was searching for IPOD hacks and came across a product that does exactly that -- the ipod connects as a CD changer and you use the radio buttons to skip forward and back, change playlists, etc. It's $150 but I know it can be done cheaper! That Ipod docking connector has plenty of connections in it -- firewire, USB, and serial, in addition to audio in/out, video out, and some configuration pins. --steve From jlg-sep at comcast.net Thu May 3 15:47:14 2007 From: jlg-sep at comcast.net (Scott Peitzsch) Date: Thu, 3 May 2007 15:47:14 -0500 Subject: [Gmecm] Shift light load References: <0ad901c78db8$1760fec0$020101c0@gandalf> Message-ID: <001401c78dc4$3eacb1c0$6601a8c0@HPDESKTOP> A typical dash indicator bulb - shift light or otherwise - is going to be either a 194 or a 168, which will consume 0.27 - 0.35A. The other typical device those quad driver outputs control are vacuum solenoids and relays, which generally check in around 60 ohms (at least the few I have here to measure), which is a sinking load of ~200mA. If I had to guess, I'd say those drivers have to be good for sinking at least an amp. However, I'd probably consider using a relay much above 500mA just to be conservative. Have you looked into any of the ultra bright LEDs? You can get the brightness you want without the penalty of hugely increased current consumption. In fact, you'd probably end up drawing LESS than you do today. I've used these in the past: http://www.autolumination.com/ -Scott > Anybody know what load can be put on the shift light pin of a '727? > > I'm using a small dash light ATM, but it's not wonderfully visible so I > was thinking of fitting something bigger and higher wattage - as long as > it doesn't fry the ECM! > > Robin From Steve.Ravet at arm.com Thu May 3 14:58:56 2007 From: Steve.Ravet at arm.com (Steve Ravet) Date: Thu, 3 May 2007 12:58:56 -0700 Subject: [Gmecm] entertainment and comfort bus? In-Reply-To: <0ad801c78db8$1734bea0$020101c0@gandalf> Message-ID: Well that would be easier... But not nearly as cool. I'm not sure just connecting something to the audio in would work, there may need to be some handshake between the components before the audio is used. Currently, with nothing connected, pushing the AUX button has no effect. Simple enough to try, though. There's no tape player so I can't use that adapter. > -----Original Message----- > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Rob Handley > Sent: Thursday, May 03, 2007 2:19 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] entertainment and comfort bus? > > Would it not be easier to connect the earphone o/p to phono > inputs on the back of the radio? > > If this is not possible, I found the cassette interface > provided better S/N than the FM transmitter I bought. > > BR, > > Robin > > ----- Original Message ----- > From: "Steve Ravet" > To: > Sent: 03 May 2007 17:25 > Subject: RE: [Gmecm] entertainment and comfort bus? > > > I've been wanting to connect my ipod directly to the radio instead of > using the fm transmitter that I have. I was searching for IPOD hacks > and came across a product that does exactly that -- the ipod > connects as > a CD changer and you use the radio buttons to skip forward and back, > change playlists, etc. It's $150 but I know it can be done cheaper! > That Ipod docking connector has plenty of connections in it > -- firewire, > USB, and serial, in addition to audio in/out, video out, and some > configuration pins. > > --steve -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. From 9jim30 at charter.net Thu May 3 15:30:51 2007 From: 9jim30 at charter.net (James Panter) Date: Thu, 3 May 2007 15:30:51 -0500 Subject: [Gmecm] entertainment and comfort bus? References: Message-ID: <00f201c78dc1$f2c24150$6401a8c0@COMPY> Steve I've just kind of been on the side looking at this. Why not try one of the cassette adapters and see how the fidelity is---they worked pretty good on the radios which only had the cassette player. ----- Original Message ----- From: "Steve Ravet" To: Sent: Thursday, May 03, 2007 2:58 PM Subject: RE: [Gmecm] entertainment and comfort bus? Well that would be easier... But not nearly as cool. I'm not sure just connecting something to the audio in would work, there may need to be some handshake between the components before the audio is used. Currently, with nothing connected, pushing the AUX button has no effect. Simple enough to try, though. There's no tape player so I can't use that adapter. > -----Original Message----- > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Rob Handley > Sent: Thursday, May 03, 2007 2:19 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] entertainment and comfort bus? > > Would it not be easier to connect the earphone o/p to phono > inputs on the back of the radio? > > If this is not possible, I found the cassette interface > provided better S/N than the FM transmitter I bought. > > BR, > > Robin > > ----- Original Message ----- > From: "Steve Ravet" > To: > Sent: 03 May 2007 17:25 > Subject: RE: [Gmecm] entertainment and comfort bus? > > > I've been wanting to connect my ipod directly to the radio instead of > using the fm transmitter that I have. I was searching for IPOD hacks > and came across a product that does exactly that -- the ipod > connects as > a CD changer and you use the radio buttons to skip forward and back, > change playlists, etc. It's $150 but I know it can be done cheaper! > That Ipod docking connector has plenty of connections in it > -- firewire, > USB, and serial, in addition to audio in/out, video out, and some > configuration pins. > > --steve -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From marqsta at ptd.net Thu May 3 15:52:42 2007 From: marqsta at ptd.net (js) Date: Thu, 3 May 2007 16:52:42 -0400 Subject: [Gmecm] entertainment and comfort bus? In-Reply-To: References: <0ad801c78db8$1734bea0$020101c0@gandalf> Message-ID: <054b01c78dc4$fe9766b0$0500a8c0@SATAN> I don't have any info on the gm bus but here are a few things on the ipod's comm protocols I found while trying to do the same with my aftermarket head unit. Hope it helps. http://ipodlinux.org/IPod_to_T%26A_remotecontrol_adapter http://stud3.tuwien.ac.at/~e0026607/ipod_remote/ipod_ap.html -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Steve Ravet Sent: Thursday, May 03, 2007 3:59 PM To: gmecm at diy-efi.org Subject: RE: [Gmecm] entertainment and comfort bus? Well that would be easier... But not nearly as cool. I'm not sure just connecting something to the audio in would work, there may need to be some handshake between the components before the audio is used. Currently, with nothing connected, pushing the AUX button has no effect. Simple enough to try, though. There's no tape player so I can't use that adapter. > -----Original Message----- > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Rob Handley > Sent: Thursday, May 03, 2007 2:19 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] entertainment and comfort bus? > > Would it not be easier to connect the earphone o/p to phono inputs on > the back of the radio? > > If this is not possible, I found the cassette interface provided > better S/N than the FM transmitter I bought. > > BR, > > Robin > > ----- Original Message ----- > From: "Steve Ravet" > To: > Sent: 03 May 2007 17:25 > Subject: RE: [Gmecm] entertainment and comfort bus? > > > I've been wanting to connect my ipod directly to the radio instead of > using the fm transmitter that I have. I was searching for IPOD hacks > and came across a product that does exactly that -- the ipod connects > as a CD changer and you use the radio buttons to skip forward and > back, change playlists, etc. It's $150 but I know it can be done > cheaper! > That Ipod docking connector has plenty of connections in it > -- firewire, > USB, and serial, in addition to audio in/out, video out, and some > configuration pins. > > --steve -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From Robin at FuryWorld.fsnet.co.uk Thu May 3 17:51:36 2007 From: Robin at FuryWorld.fsnet.co.uk (Rob Handley) Date: Thu, 3 May 2007 23:51:36 +0100 Subject: [Gmecm] entertainment and comfort bus? References: Message-ID: <0ae901c78dd5$9c7ac330$020101c0@gandalf> If the head unit expects some fancy protocol, which demands an autochanger controller then no (cheap) joy. That's what I found with a Fraud cassette radio. The cheap solutions were the FM transmitter and cassette interface. R ----- Original Message ----- From: "Steve Ravet" To: Sent: 03 May 2007 20:58 Subject: RE: [Gmecm] entertainment and comfort bus? Well that would be easier... But not nearly as cool. I'm not sure just connecting something to the audio in would work, there may need to be some handshake between the components before the audio is used. Currently, with nothing connected, pushing the AUX button has no effect. Simple enough to try, though. There's no tape player so I can't use that adapter. > -----Original Message----- > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Rob Handley > Sent: Thursday, May 03, 2007 2:19 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] entertainment and comfort bus? > > Would it not be easier to connect the earphone o/p to phono > inputs on the back of the radio? > > If this is not possible, I found the cassette interface > provided better S/N than the FM transmitter I bought. > > BR, > > Robin > > ----- Original Message ----- > From: "Steve Ravet" > To: > Sent: 03 May 2007 17:25 > Subject: RE: [Gmecm] entertainment and comfort bus? > > > I've been wanting to connect my ipod directly to the radio instead of > using the fm transmitter that I have. I was searching for IPOD hacks > and came across a product that does exactly that -- the ipod > connects as > a CD changer and you use the radio buttons to skip forward and back, > change playlists, etc. It's $150 but I know it can be done cheaper! > That Ipod docking connector has plenty of connections in it > -- firewire, > USB, and serial, in addition to audio in/out, video out, and some > configuration pins. > > --steve -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From burntkat at sc.rr.com Fri May 4 05:31:12 2007 From: burntkat at sc.rr.com (burntkat at sc.rr.com) Date: Fri, 04 May 2007 06:31:12 -0400 Subject: [Gmecm] entertainment and comfort bus? In-Reply-To: <0ae901c78dd5$9c7ac330$020101c0@gandalf> References: <0ae901c78dd5$9c7ac330$020101c0@gandalf> Message-ID: Agreed. Of course the immediate rallying cry when "FM transmitter" or "cassette adapter" are mentioned, will be loss. Which will be ironic, when we consider that these are MP3s we're playing... :) ----- Original Message ----- From: Rob Handley Date: Thursday, May 3, 2007 6:47 pm Subject: Re: [Gmecm] entertainment and comfort bus? To: gmecm at diy-efi.org > If the head unit expects some fancy protocol, which demands an > autochanger > controller then no (cheap) joy. That's what I found with a Fraud > cassette > radio. The cheap solutions were the FM transmitter and cassette > interface. > R > > ----- Original Message ----- > From: "Steve Ravet" > To: > Sent: 03 May 2007 20:58 > Subject: RE: [Gmecm] entertainment and comfort bus? > > > Well that would be easier... But not nearly as cool. I'm not > sure just > connecting something to the audio in would work, there may need to be > some handshake between the components before the audio is used. > Currently, with nothing connected, pushing the AUX button has no > effect.Simple enough to try, though. There's no tape player so I > can't use > that adapter. > > > -----Original Message----- > > From: gmecm-bounces at diy-efi.org > > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Rob Handley > > Sent: Thursday, May 03, 2007 2:19 PM > > To: gmecm at diy-efi.org > > Subject: Re: [Gmecm] entertainment and comfort bus? > > > > Would it not be easier to connect the earphone o/p to phono > > inputs on the back of the radio? > > > > If this is not possible, I found the cassette interface > > provided better S/N than the FM transmitter I bought. > > > > BR, > > > > Robin > > > > ----- Original Message ----- > > From: "Steve Ravet" > > To: > > Sent: 03 May 2007 17:25 > > Subject: RE: [Gmecm] entertainment and comfort bus? > > > > > > I've been wanting to connect my ipod directly to the radio > instead of > > using the fm transmitter that I have. I was searching for IPOD > hacks> and came across a product that does exactly that -- the ipod > > connects as > > a CD changer and you use the radio buttons to skip forward and back, > > change playlists, etc. It's $150 but I know it can be done cheaper! > > That Ipod docking connector has plenty of connections in it > > -- firewire, > > USB, and serial, in addition to audio in/out, video out, and some > > configuration pins. > > > > --steve > > -- > IMPORTANT NOTICE: The contents of this email and any attachments > are > confidential and may also be privileged. If you are not the > intended > recipient, please notify the sender immediately and do not > disclose the > contents to any other person, use it for any purpose, or store or > copy the > information in any medium. Thank you. > > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From Steve.Ravet at arm.com Fri May 4 09:22:25 2007 From: Steve.Ravet at arm.com (Steve Ravet) Date: Fri, 4 May 2007 07:22:25 -0700 Subject: [Gmecm] j1850 and/or 68hc58 experience? Message-ID: Some of you may recall that I'm working on a cable that allows you to connect a PC to a GM OBD2 computer via USB. I've made some progress, I'm able to send the "shut up" message to the PCM to get it to stop broadcasting messages, but I can't read data back from the DLC. I'm using the hc58 in serial mode and have some questions about that: Do the status bytes you get back while transmitting a message mean anything? I can't make sense out of what I get back from the DLC while transmitting a message. And after transmitting a message, for example requesting the VIN, I don't get any response. On the scope I can see the broadcast messages the PCM sends out but I never see any bytes in the receive FIFO. Here's a trace of the VIN request: data command 0x6c 0x14 0x10 0x4 0xf0 0x4 0x3c 0x4 status receive 0x00, 0x00 (receive and send FIFOs empty) 0x7b, 0x00 (receive FIFO full, end of frame not seen, link idle, link fault, send FIFO full) 0x01, 0x00 (receive FIFO empty, send FIFO has data) 0x18, 0x12 (receive FIFO empty, link idle, link fault) data command 0x1 0xc 0x0 0x0 0x0 0x0 0x0 0x0 status receive 0x00, 0x00 0x7b, 0x00 0x01, 0x00 0x18, 0x12 The transmit message is 6c 10 f0 3c 01, which requests the VIN. The status bytes don't make any sense to me, two of the status bytes report a link fault, which means the J1850 bus is shorted to ground. You can't clear this status bit except by resetting the DLC which I'm not doing. Plus the FIFOs going from empty to full and back to empty doesn't make sense, the FIFO is 12 bytes deep. --steve ------------------- Steve Ravet ARM steve.ravet at arm.com -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. From Robin at FuryWorld.fsnet.co.uk Sat May 5 09:42:25 2007 From: Robin at FuryWorld.fsnet.co.uk (Rob Handley) Date: Sat, 5 May 2007 15:42:25 +0100 Subject: [Gmecm] Shift light load References: <0ad901c78db8$1760fec0$020101c0@gandalf> <001401c78dc4$3eacb1c0$6601a8c0@HPDESKTOP> Message-ID: <0bdb01c78f25$6a7b35d0$020101c0@gandalf> Thanks Scott. I'm going to a car show tomorrow - so shall have a look out for ultra bright LED fittings. Robin ----- Original Message ----- From: "Scott Peitzsch" To: Sent: 03 May 2007 21:47 Subject: Re: [Gmecm] Shift light load >A typical dash indicator bulb - shift light or otherwise - is going to be > either a 194 or a 168, which will consume 0.27 - 0.35A. The other > typical device those quad driver outputs control are vacuum solenoids > and relays, which generally check in around 60 ohms (at least the few > I have here to measure), which is a sinking load of ~200mA. > > If I had to guess, I'd say those drivers have to be good for sinking > at least an amp. However, I'd probably consider using a relay much > above 500mA just to be conservative. > > Have you looked into any of the ultra bright LEDs? You can get the > brightness you want without the penalty of hugely increased current > consumption. In fact, you'd probably end up drawing LESS than you > do today. I've used these in the past: > > http://www.autolumination.com/ > > -Scott > > >> Anybody know what load can be put on the shift light pin of a '727? >> >> I'm using a small dash light ATM, but it's not wonderfully visible so I >> was thinking of fitting something bigger and higher wattage - as long as >> it doesn't fry the ECM! >> >> Robin > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From JohnsHome at wideopenwest.com Sat May 5 20:21:21 2007 From: JohnsHome at wideopenwest.com (JohnsHome) Date: Sat, 5 May 2007 20:21:21 -0500 Subject: [Gmecm] Shift light load In-Reply-To: <0bdb01c78f25$6a7b35d0$020101c0@gandalf> Message-ID: LEDs work nice on a quad output when used with the right resistor. The only thing is that the leakage current will keep the LED dimly lit. Not a big deal but you may want to fiddle with resistors to get the best dim/bright settings. John > -----Original Message----- > From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org]On > Behalf Of Rob Handley > Sent: Saturday, May 05, 2007 9:42 AM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] Shift light load > > > Thanks Scott. > > I'm going to a car show tomorrow - so shall have a look out for > ultra bright > LED fittings. > > Robin > > ----- Original Message ----- > From: "Scott Peitzsch" > To: > Sent: 03 May 2007 21:47 > Subject: Re: [Gmecm] Shift light load > > > >A typical dash indicator bulb - shift light or otherwise - is going to be > > either a 194 or a 168, which will consume 0.27 - 0.35A. The other > > typical device those quad driver outputs control are vacuum solenoids > > and relays, which generally check in around 60 ohms (at least the few > > I have here to measure), which is a sinking load of ~200mA. > > > > If I had to guess, I'd say those drivers have to be good for sinking > > at least an amp. However, I'd probably consider using a relay much > > above 500mA just to be conservative. > > > > Have you looked into any of the ultra bright LEDs? You can get the > > brightness you want without the penalty of hugely increased current > > consumption. In fact, you'd probably end up drawing LESS than you > > do today. I've used these in the past: > > > > http://www.autolumination.com/ > > > > -Scott > > > > > >> Anybody know what load can be put on the shift light pin of a '727? > >> > >> I'm using a small dash light ATM, but it's not wonderfully > visible so I > >> was thinking of fitting something bigger and higher wattage - > as long as > >> it doesn't fry the ECM! > >> > >> Robin > > > > _______________________________________________ > > Gmecm mailing list > > Gmecm at diy-efi.org > > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > > Main WWW page: http://www.diy-efi.org/gmecm > > > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From bcroe at juno.com Sat May 5 19:42:29 2007 From: bcroe at juno.com (bcroe at juno.com) Date: Sat, 5 May 2007 19:42:29 -0500 Subject: [Gmecm] Shift light load Message-ID: <20070506.002539.1044.0.bcroe@juno.com> You ought to be able to put a resistor in parallel with the LED to keep leakage current from building up enough votage to turn the LED on. A couple 1N4004s in series with the LED could increase the threshold voltage req'd to turn on the LED, while allowing a higher value resistor in parallel with the combination to absorb leakage current. You still need a resistor in series with the source, to limit "on" current. The latest high efficiency LEDs can put out a LOT of light (but rather directionally) with very little current. Bruce Roe 5 May 07 "JohnsHome" writes: > LEDs work nice on a quad output when used with the right resistor. > The only thing is that the leakage current will keep the LED dimly > lit. > Not a big deal but you may want to fiddle with resistors to get the > best > dim/bright settings. > John > > > -----Original Message----- > > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org]On > > Behalf Of Rob Handley > > Sent: Saturday, May 05, 2007 9:42 AM > > To: gmecm at diy-efi.org > > Subject: Re: [Gmecm] Shift light load > > > > > > Thanks Scott. > > > > I'm going to a car show tomorrow - so shall have a look out for > > ultra bright > > LED fittings. > > > > Robin > > > > ----- Original Message ----- > > From: "Scott Peitzsch" > > To: > > Sent: 03 May 2007 21:47 > > Subject: Re: [Gmecm] Shift light load > > > > > > >A typical dash indicator bulb - shift light or otherwise - is > going to be > > > either a 194 or a 168, which will consume 0.27 - 0.35A. The > other > > > typical device those quad driver outputs control are vacuum > solenoids > > > and relays, which generally check in around 60 ohms (at least > the few > > > I have here to measure), which is a sinking load of ~200mA. > > > > > > If I had to guess, I'd say those drivers have to be good for > sinking > > > at least an amp. However, I'd probably consider using a relay > much > > > above 500mA just to be conservative. > > > > > > Have you looked into any of the ultra bright LEDs? You can get > the > > > brightness you want without the penalty of hugely increased > current > > > consumption. In fact, you'd probably end up drawing LESS than > you > > > do today. I've used these in the past: > > > > > > http://www.autolumination.com/ > > > > > > -Scott > > > > > > > > >> Anybody know what load can be put on the shift light pin of a > '727? > > >> > > >> I'm using a small dash light ATM, but it's not wonderfully > > visible so I > > >> was thinking of fitting something bigger and higher wattage - > > as long as > > >> it doesn't fry the ECM! > > >> > > >> Robin > > > > > > _______________________________________________ > > > Gmecm mailing list > > > Gmecm at diy-efi.org > > > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > > > Main WWW page: http://www.diy-efi.org/gmecm > > > > > > > _______________________________________________ > > Gmecm mailing list > > Gmecm at diy-efi.org > > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > > Main WWW page: http://www.diy-efi.org/gmecm > > > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From andrewsharyn at yahoo.com Sun May 6 17:08:37 2007 From: andrewsharyn at yahoo.com (Andrew Gibson) Date: Sun, 6 May 2007 15:08:37 -0700 (PDT) Subject: [Gmecm] Re: vehicle stability control system Message-ID: <133008.26108.qm@web60815.mail.yahoo.com> You could potentailly replace the EBTCM with an EBCM from a truck but I don't know why you would want to. The truck's EBCM would have programming for the braking response for a truck which would be slightly delayed on the rear wheels (Trucks are loaded different than a Yukon.) I would also beware from a safety factor of removing the stabiliy control from a suv. The engineers put it there for a reason. I went to a class on it and I think it's really good. Mainly because the computerized response time to excessive yaw is milliseconds. I can guarantee your respose time is not. But if you don't like it you can always hit the trac off button which diables both and certainly will not cause communication problems. --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos. From andrewsharyn at yahoo.com Sun May 6 17:10:31 2007 From: andrewsharyn at yahoo.com (Andrew Gibson) Date: Sun, 6 May 2007 15:10:31 -0700 (PDT) Subject: [Gmecm] Re: Shift light load Message-ID: <451122.83328.qm@web60813.mail.yahoo.com> Why not just use a relay? The .05 second switch time will not matter on a shift light, and most relays draw less current than a light bulb. Then you could put a 60 watt bulb if you wanted one really bright! --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos. From rawardsr at ameritech.net Mon May 7 07:39:16 2007 From: rawardsr at ameritech.net (rawardsr at ameritech.net) Date: Mon, 7 May 2007 05:39:16 -0700 (PDT) Subject: [Gmecm] The passing of a legend In-Reply-To: <451122.83328.qm@web60813.mail.yahoo.com> Message-ID: <558215.43751.qm@web35403.mail.mud.yahoo.com> Bruce "Grumpy" Plecan went into the great source code in the sky over the weekend. No information on services yet, I will pass information along as it becomes available. Bob From Pat.Ford at nrc-cnrc.gc.ca Mon May 7 07:41:13 2007 From: Pat.Ford at nrc-cnrc.gc.ca (Ford, Pat) Date: Mon, 7 May 2007 08:41:13 -0400 Subject: [Gmecm] The passing of a legend In-Reply-To: <558215.43751.qm@web35403.mail.mud.yahoo.com> References: <451122.83328.qm@web60813.mail.yahoo.com> <558215.43751.qm@web35403.mail.mud.yahoo.com> Message-ID: <626E1206D3466344A57EB7A268D4587F046B967F@nrccenexb4.nrc.ca> Wow, what a loss to the tuning community. Pat -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of rawardsr at ameritech.net Sent: Monday, May 07, 2007 8:39 AM To: gmecm at diy-efi.org Subject: [Gmecm] The passing of a legend Bruce "Grumpy" Plecan went into the great source code in the sky over the weekend. No information on services yet, I will pass information along as it becomes available. Bob _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From harford at gmail.com Mon May 7 11:16:30 2007 From: harford at gmail.com (Alex Harford) Date: Mon, 7 May 2007 09:16:30 -0700 Subject: [Gmecm] The passing of a legend In-Reply-To: <558215.43751.qm@web35403.mail.mud.yahoo.com> References: <451122.83328.qm@web60813.mail.yahoo.com> <558215.43751.qm@web35403.mail.mud.yahoo.com> Message-ID: He will be missed. :( On 5/7/07, rawardsr at ameritech.net wrote: > Bruce "Grumpy" Plecan went into the great source code > in the sky over the weekend. No information on > services yet, I will pass information along as it > becomes available. From Robin at FuryWorld.fsnet.co.uk Mon May 7 13:29:08 2007 From: Robin at FuryWorld.fsnet.co.uk (Rob Handley) Date: Mon, 7 May 2007 19:29:08 +0100 Subject: [Gmecm] The passing of a legend References: <558215.43751.qm@web35403.mail.mud.yahoo.com> Message-ID: <0c5e01c790d6$102575c0$020101c0@gandalf> Very sorry to hear that. If anybody on list is in contact with his relatives, please pass on many condolences and much respect etc. Robin ----- Original Message ----- From: To: Sent: 07 May 2007 13:39 Subject: [Gmecm] The passing of a legend > Bruce "Grumpy" Plecan went into the great source code > in the sky over the weekend. No information on > services yet, I will pass information along as it > becomes available. > > Bob > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From Robin at FuryWorld.fsnet.co.uk Mon May 7 13:30:54 2007 From: Robin at FuryWorld.fsnet.co.uk (Rob Handley) Date: Mon, 7 May 2007 19:30:54 +0100 Subject: [Gmecm] Re: Shift light load References: <451122.83328.qm@web60813.mail.yahoo.com> Message-ID: <0c5f01c790d6$10767bf0$020101c0@gandalf> It's a thought, but hassle. I failed to find a suitable ultra-bright LED fitting at the show. There were a selection of ultra-bright LED replacement bulbs, but nothing suitable built into a panel mounting. It's not a major problem, though. I'll keep my eye out... Robin ----- Original Message ----- From: "Andrew Gibson" To: Sent: 06 May 2007 23:10 Subject: [Gmecm] Re: Shift light load > Why not just use a relay? The .05 second switch time will not matter on a > shift light, and most relays draw less current than a light bulb. Then you > could put a 60 watt bulb if you wanted one really bright! > > --------------------------------- > Ahhh...imagining that irresistible "new car" smell? > Check outnew cars at Yahoo! Autos. > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From romans at starstream.net Mon May 7 13:30:48 2007 From: romans at starstream.net (Mark Romans) Date: Mon, 7 May 2007 11:30:48 -0700 Subject: [Gmecm] The passing of a legend References: <558215.43751.qm@web35403.mail.mud.yahoo.com> Message-ID: <001501c790d5$d5b437a0$6801a8c0@fci9bo2ay5h5y8> Very sad! Huge loss... Great guy, helped further tuning immeasurably! Always there when I needed help! I didn't talk to him often or often enough... But I feel a loss, just knowing he's only with us in cyber space and spirit from now on. Mark ----- Original Message ----- From: To: Sent: Monday, May 07, 2007 5:39 AM Subject: [Gmecm] The passing of a legend > Bruce "Grumpy" Plecan went into the great source code > in the sky over the weekend. No information on > services yet, I will pass information along as it > becomes available. > > Bob > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From 9jim30 at charter.net Mon May 7 14:01:12 2007 From: 9jim30 at charter.net (James Panter) Date: Mon, 7 May 2007 14:01:12 -0500 Subject: [Gmecm] Re: Shift light load References: <451122.83328.qm@web60813.mail.yahoo.com> <0c5f01c790d6$10767bf0$020101c0@gandalf> Message-ID: <005301c790da$1572bde0$6401a8c0@COMPY> Look on Ebay---there is a plethora ----- Original Message ----- From: "Rob Handley" To: Sent: Monday, May 07, 2007 1:30 PM Subject: Re: [Gmecm] Re: Shift light load > It's a thought, but hassle. > > I failed to find a suitable ultra-bright LED fitting at the show. There > were a selection of ultra-bright LED replacement bulbs, but nothing > suitable built into a panel mounting. It's not a major problem, though. > I'll keep my eye out... > > Robin > > ----- Original Message ----- > From: "Andrew Gibson" > To: > Sent: 06 May 2007 23:10 > Subject: [Gmecm] Re: Shift light load > > >> Why not just use a relay? The .05 second switch time will not matter on a >> shift light, and most relays draw less current than a light bulb. Then >> you could put a 60 watt bulb if you wanted one really bright! >> >> --------------------------------- >> Ahhh...imagining that irresistible "new car" smell? >> Check outnew cars at Yahoo! Autos. >> _______________________________________________ >> Gmecm mailing list >> Gmecm at diy-efi.org >> Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm >> Main WWW page: http://www.diy-efi.org/gmecm >> > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From wopontour at hotmail.com Mon May 7 18:30:07 2007 From: wopontour at hotmail.com (WopOnTour) Date: Mon, 7 May 2007 16:30:07 -0700 Subject: [Gmecm] The passing of a legend References: <558215.43751.qm@web35403.mail.mud.yahoo.com> <001501c790d5$d5b437a0$6801a8c0@fci9bo2ay5h5y8> Message-ID: Godspeed Bruce! WopOnTour ----- Original Message ----- From: "Mark Romans" To: Sent: Monday, May 07, 2007 11:30 AM Subject: Re: [Gmecm] The passing of a legend > Very sad! Huge loss... > > Great guy, helped further tuning immeasurably! Always there when I needed > help! > > I didn't talk to him often or often enough... But I feel a loss, just > knowing he's only with us in > cyber space and spirit from now on. > > Mark > ----- Original Message ----- > From: > To: > Sent: Monday, May 07, 2007 5:39 AM > Subject: [Gmecm] The passing of a legend > > >> Bruce "Grumpy" Plecan went into the great source code >> in the sky over the weekend. No information on >> services yet, I will pass information along as it >> becomes available. >> >> Bob >> _______________________________________________ >> Gmecm mailing list >> Gmecm at diy-efi.org >> Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm >> Main WWW page: http://www.diy-efi.org/gmecm >> > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From darrenfreed at gmail.com Tue May 8 12:28:12 2007 From: darrenfreed at gmail.com (Darren Freed) Date: Tue, 8 May 2007 18:28:12 +0100 Subject: [Gmecm] j1850 and/or 68hc58 experience? In-Reply-To: References: Message-ID: Steve, The other thing you may want to consider is connecting an ELM-based device on the Class 2 bus so that you can see what you really _should_ be expecting to see. I would think that would take some of the uncertainty out of it. FWIW, the receive msg doesn't make any sense to me either. You really should see a response to the 'shut up' command (mode $28). That mode #3c request (VIN) has worked for me, using the an AVT device. Darren On 5/4/07, Steve Ravet wrote: > > Some of you may recall that I'm working on a cable that allows you to > connect a PC to a GM OBD2 computer via USB. I've made some progress, > I'm able to send the "shut up" message to the PCM to get it to stop > broadcasting messages, but I can't read data back from the DLC. I'm > using the hc58 in serial mode and have some questions about that: Do > the status bytes you get back while transmitting a message mean > anything? I can't make sense out of what I get back from the DLC while > transmitting a message. And after transmitting a message, for example > requesting the VIN, I don't get any response. On the scope I can see > the broadcast messages the PCM sends out but I never see any bytes in > the receive FIFO. Here's a trace of the VIN request: > > > data command > 0x6c 0x14 > 0x10 0x4 > 0xf0 0x4 > 0x3c 0x4 > > status receive > 0x00, 0x00 (receive and send FIFOs empty) > 0x7b, 0x00 (receive FIFO full, end of frame not seen, link > idle, link fault, send FIFO full) > 0x01, 0x00 (receive FIFO empty, send FIFO has data) > 0x18, 0x12 (receive FIFO empty, link idle, link fault) > > data command > 0x1 0xc > 0x0 0x0 > 0x0 0x0 > 0x0 0x0 > > status receive > 0x00, 0x00 > 0x7b, 0x00 > 0x01, 0x00 > 0x18, 0x12 > > The transmit message is 6c 10 f0 3c 01, which requests the VIN. The > status bytes don't make any sense to me, two of the status bytes report > a link fault, which means the J1850 bus is shorted to ground. You can't > clear this status bit except by resetting the DLC which I'm not doing. > Plus the FIFOs going from empty to full and back to empty doesn't make > sense, the FIFO is 12 bytes deep. > > --steve > > ------------------- > Steve Ravet > ARM > steve.ravet at arm.com > > -- > IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. If you are not the intended > recipient, please notify the sender immediately and do not disclose the > contents to any other person, use it for any purpose, or store or copy the > information in any medium. Thank you. > > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From Steve.Ravet at arm.com Tue May 8 13:48:32 2007 From: Steve.Ravet at arm.com (Steve Ravet) Date: Tue, 8 May 2007 11:48:32 -0700 Subject: [Gmecm] j1850 and/or 68hc58 experience? In-Reply-To: Message-ID: That's a good idea (the ELM device). I took a closer look at the firmware and I think there may be some problems in there, I should post it on the twiki so you-all can eyeball it. --steve > -----Original Message----- > From: gmecm-bounces at diy-efi.org > [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Darren Freed > Sent: Tuesday, May 08, 2007 12:28 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] j1850 and/or 68hc58 experience? > > Steve, > > The other thing you may want to consider is connecting an > ELM-based device on the Class 2 bus so that you can see what > you really _should_ be expecting to see. I would think that > would take some of the uncertainty out of it. > > FWIW, the receive msg doesn't make any sense to me either. > You really should see a response to the 'shut up' command > (mode $28). That mode #3c request (VIN) has worked for me, > using the an AVT device. > > Darren > > > On 5/4/07, Steve Ravet wrote: > > > > Some of you may recall that I'm working on a cable that > allows you to > > connect a PC to a GM OBD2 computer via USB. I've made some > progress, > > I'm able to send the "shut up" message to the PCM to get it to stop > > broadcasting messages, but I can't read data back from the > DLC. I'm > > using the hc58 in serial mode and have some questions about > that: Do > > the status bytes you get back while transmitting a message mean > > anything? I can't make sense out of what I get back from the DLC > > while transmitting a message. And after transmitting a > message, for > > example requesting the VIN, I don't get any response. On > the scope I > > can see the broadcast messages the PCM sends out but I > never see any > > bytes in the receive FIFO. Here's a trace of the VIN request: > > > > > > data command > > 0x6c 0x14 > > 0x10 0x4 > > 0xf0 0x4 > > 0x3c 0x4 > > > > status receive > > 0x00, 0x00 (receive and send FIFOs empty) > > 0x7b, 0x00 (receive FIFO full, end of frame not > seen, link > > idle, link fault, send FIFO full) > > 0x01, 0x00 (receive FIFO empty, send FIFO has data) > > 0x18, 0x12 (receive FIFO empty, link idle, link fault) > > > > data command > > 0x1 0xc > > 0x0 0x0 > > 0x0 0x0 > > 0x0 0x0 > > > > status receive > > 0x00, 0x00 > > 0x7b, 0x00 > > 0x01, 0x00 > > 0x18, 0x12 > > > > The transmit message is 6c 10 f0 3c 01, which requests the > VIN. The > > status bytes don't make any sense to me, two of the status bytes > > report a link fault, which means the J1850 bus is shorted > to ground. > > You can't clear this status bit except by resetting the DLC > which I'm not doing. > > Plus the FIFOs going from empty to full and back to empty > doesn't make > > sense, the FIFO is 12 bytes deep. > > > > --steve > > > > ------------------- > > Steve Ravet > > ARM > > steve.ravet at arm.com > > > > -- > > IMPORTANT NOTICE: The contents of this email and any > attachments are > > confidential and may also be privileged. If you are not the > intended > > recipient, please notify the sender immediately and do not disclose > > the contents to any other person, use it for any purpose, > or store or > > copy the information in any medium. Thank you. > > > > > > _______________________________________________ > > Gmecm mailing list > > Gmecm at diy-efi.org > > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > > Main WWW page: http://www.diy-efi.org/gmecm > > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From dozierhc at aol.com Tue May 8 14:04:59 2007 From: dozierhc at aol.com (dozierhc at aol.com) Date: Tue, 08 May 2007 15:04:59 -0400 Subject: [Gmecm] Re: Passing of a legend (Hank Dozier) Message-ID: <8C95FBAE86C40FC-C7C-2B86@webmail-de02.sysops.aol.com> Sorry to hear of this. I spoke with Grumpy on a couple of occasions, and also passed some code fragments back and forth. A truly unique individual! No matter if you agreed with him or not, I think everyone here respected the depth of knowledge he possesed, and he was never at a loss to provide assistance to those that asked. He never tried to limit himself, even with his health issues. Bruce...Maybe now you have the answers to all those questions you posed me, that I could not answer! Sorry you didn't finish your GNStang.........Would have been another out-of-the box thinking vehicle! Hank _______________________________________________ ----- Original Message ----- From: To: Sent: 07 May 2007 13:39 Subject: [Gmecm] The passing of a legend > Bruce "Grumpy" Plecan went into the great source code > in the sky over the weekend. No information on > services yet, I will pass information along as it > becomes available. > > Bob ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. From lwester at lincsat.com Wed May 9 09:51:49 2007 From: lwester at lincsat.com (Programmer) Date: Wed, 9 May 2007 08:51:49 -0600 Subject: [Gmecm] The passing of a legend References: <558215.43751.qm@web35403.mail.mud.yahoo.com> Message-ID: <003201c79249$97570940$0200a8c0@WESTER2> Still hard to believe...Scott phoned me on Monday. I had a really good chat with Bruce two years ago...I felt he had his head on straight about the important things in life...was really hoping to see him at one more event to test his latest toy. He fought long and hard, and wasn't dealt the best deal--but I never heard him complain. Lyndon. ----- Original Message ----- From: To: Sent: Monday, May 07, 2007 6:39 AM Subject: [Gmecm] The passing of a legend > Bruce "Grumpy" Plecan went into the great source code > in the sky over the weekend. No information on > services yet, I will pass information along as it > becomes available. > > Bob > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm From efi at dyakron.com Wed May 9 15:41:58 2007 From: efi at dyakron.com (Mike V) Date: Wed, 9 May 2007 16:41:58 -0400 Subject: [Gmecm] The passing of a legend References: <558215.43751.qm@web35403.mail.mud.yahoo.com> <003201c79249$97570940$0200a8c0@WESTER2> Message-ID: <004b01c7927a$7d590580$0b01a8c0@IBMm> You hit it on the head Lyndon. The health issues he endured before & after his heart/lung transplant were staggering. He had a zeal for life and for all things car-related - and he never complained as long as he was tuning. I was not as close to Bruce as some others on this list. We met for lunch and to swap EFI goodies a couple times. He had a great sense of humor, as well as the highest regard for many people here. He had lots of stories. We could have talked forever. When I told my wife about his passing, she said something like: "People are like dogs. The big lovable ones are with us for far too little time. The little mean ones just seem to live forever." It was her long pause and the stare at me after mentioning the little mean ones that I didn't like. Seriously, Bruce was a good guy. I am saddened by the news of his passing. mv > Still hard to believe...Scott phoned me on Monday. > I had a really good chat with Bruce two years ago...I felt he had his head > on straight about the important things in life...was really hoping to see > him at one more event to test his latest toy. He fought long and hard, and > wasn't dealt the best deal--but I never heard him complain. > > Lyndon. From turbodig at yahoo.com Fri May 11 11:11:27 2007 From: turbodig at yahoo.com (Dig) Date: Fri, 11 May 2007 09:11:27 -0700 (PDT) Subject: [Gmecm] Quad Driver currrent capacity? Message-ID: <852261.97481.qm@web35312.mail.mud.yahoo.com> Apologies if this is a FAQ... searched the twiki and the archives, couldn't find anything conclusive. Anyobdy have an idea about how much current capacity the quad drivers in a '749/'730 have? Will they take amps or are they millamp devices. I'm looking to PWM drive about 6-7 amps, would prefer not having external circuitry, but if I gotta, I gotta. Thanks, Dig turbodig (at)yahoo.com code59.org team nerd RIP Bruce From dozierhc at aol.com Fri May 11 12:39:52 2007 From: dozierhc at aol.com (dozierhc at aol.com) Date: Fri, 11 May 2007 13:39:52 -0400 Subject: [Gmecm] Re: Gmecm Digest, Vol 27, Issue 10 In-Reply-To: <200705111300.a354644a11a2bf@rly-mg09.mx.aol.com> References: <200705111300.a354644a11a2bf@rly-mg09.mx.aol.com> Message-ID: <8C9620A841D6E99-FB8-9385@WEBMAIL-MA14.sysops.aol.com> Dig... I think they can individually handle about 3 to 3.5 Watts without an issue. Unless you are using multiple at same time at high DCs or in an ON/OFF configuration. The typical load driven is about 60 Ohms. So P= VI, and I=V/R. ===> P= (V^2)/R. If V= 14 Volts (typical) and R = 60 Ohms, then Power is 196/60 or 3.2 Watts. So now if you use 14 Volts and 3.5 Watts (max), you get I = P/V ==> 3.5/14 = 0.25 Amps per pin. I know there is some safety margin built in, but I do NOT think you can directly drive 6 to 7 amps @ 12V with a direct quad driver output. I think you might want to possible use the Quad output and put a MOSFET transistor on its output. I think thre might be room on a 749 or 7727/7730 ECM heat sink to attach one and run the wiring to/from it so as to use the connector for this rather than an off-board solution if PWM. Just make sure you use at least a 14gauge wire for your run. If its ON/OFF, then I would use an external relay... Hank ---------------------------------------------------------------------- Message: 1 Date: Fri, 11 May 2007 09:11:27 -0700 (PDT) From: Dig Subject: [Gmecm] Quad Driver currrent capacity? To: gmecm at diy-efi.org Message-ID: <852261.97481.qm at web35312.mail.mud.yahoo.com> Content-Type: text/plain; charset=ascii Apologies if this is a FAQ... searched the twiki and the archives, couldn't find anything conclusive. Anyobdy have an idea about how much current capacity the quad drivers in a '749/'730 have? Will they take amps or are they millamp devices. I'm looking to PWM drive about 6-7 amps, would prefer not having external circuitry, but if I gotta, I gotta. Thanks, Dig turbodig (at)yahoo.com code59.org team nerd RIP Bruce ------------------------------ _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/gmecm End of Gmecm Digest, Vol 27, Issue 10 ************************************* ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. From turbodig at yahoo.com Fri May 11 13:45:12 2007 From: turbodig at yahoo.com (Dig) Date: Fri, 11 May 2007 11:45:12 -0700 (PDT) Subject: [Gmecm] Quad Driver currrent capacity? Message-ID: <888637.79715.qm@web35313.mail.mud.yahoo.com> Thanks Hank. I'm using it as motor speed control, so the on/off thing is out. Thunkin' out loud... Anybody switched a solid-state DC relay at say, 32hz? http://rocky.digikey.com/WebLib/Crydom/Web%20Data/EZ%20Series.pdf I'm trying to avoid having to wire-up circuits, making PCBs, worrying about heatsinks, etc. Just wire it up, and go. One way to find out, I guess... Dig ----- Original Message ---- From: "dozierhc at aol.com" To: gmecm at diy-efi.org Sent: Friday, May 11, 2007 12:39:52 PM Subject: [Gmecm] Re: Gmecm Digest, Vol 27, Issue 10 Dig... I think they can individually handle about 3 to 3.5 Watts without an issue. Unless you are using multiple at same time at high DCs or in an ON/OFF configuration. The typical load driven is about 60 Ohms. So P= VI, and I=V/R. ===> P= (V^2)/R. If V= 14 Volts (typical) and R = 60 Ohms, then Power is 196/60 or 3.2 Watts. So now if you use 14 Volts and 3.5 Watts (max), you get I = P/V ==> 3.5/14 = 0.25 Amps per pin. I know there is some safety margin built in, but I do NOT think you can directly drive 6 to 7 amps @ 12V with a direct quad driver output. I think you might want to possible use the Quad output and put a MOSFET transistor on its output. I think thre might be room on a 749 or 7727/7730 ECM heat sink to attach one and run the wiring to/from it so as to use the connector for this rather than an off-board solution if PWM. Just make sure you use at least a 14gauge wire for your run. If its ON/OFF, then I would use an external relay... Hank ---------------------------------------------------------------------- Message: 1 Date: Fri, 11 May 2007 09:11:27 -0700 (PDT) From: Dig Subject: [Gmecm] Quad Driver currrent capacity? To: gmecm at diy-efi.org Message-ID: <852261.97481.qm at web35312.mail.mud.yahoo.com> Content-Type: text/plain; charset=ascii Apologies if this is a FAQ... searched the twiki and the archives, couldn't find anything conclusive. Anyobdy have an idea about how much current capacity the quad drivers in a '749/'730 have? Will they take amps or are they millamp devices. I'm looking to PWM drive about 6-7 amps, would prefer not having external circuitry, but if I gotta, I gotta. Thanks, Dig turbodig (at)yahoo.com code59.org team nerd RIP Bruce ------------------------------ _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/gmecm End of Gmecm Digest, Vol 27, Issue 10 ************************************* ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From Terminal_Crazy at sand-hill.freeserve.co.uk Fri May 11 14:20:18 2007 From: Terminal_Crazy at sand-hill.freeserve.co.uk (Terminal Crazy) Date: Fri, 11 May 2007 20:20:18 +0100 Subject: [Gmecm] Quad Driver currrent capacity? In-Reply-To: <888637.79715.qm@web35313.mail.mud.yahoo.com> References: <888637.79715.qm@web35313.mail.mud.yahoo.com> Message-ID: <4ee1752cd1Terminal_Crazy@sand-hill.freeserve.co.uk> On 11 May, Dig wrote: > Thanks Hank. I'm using it as motor speed control, so the on/off thing > is out. > Thunkin' out loud... > Anybody switched a solid-state DC relay at say, 32hz? > http://rocky.digikey.com/WebLib/Crydom/Web%20Data/EZ%20Series.pdf > I'm trying to avoid having to wire-up circuits, making PCBs, worrying > about heatsinks, etc. Just wire it up, and go. That link shows 5Volt & 24Volt coils.. What are you powering it from? Also Max on time 10msec Max off time 40msec (ac input) so that's 50msec. ie 20/second minimum. You'd probably be better off with a power transistor me thinks. Nothing to wear out / stick either. HTH -- Mitch - 1995 Z28 LT1 M6 terminal_crazy at sand-hill.freeserve.co.uk Lancashire England http://www.sand-hill.freeserve.co.uk/terminal_crazy/ From wopontour at hotmail.com Fri May 11 22:51:13 2007 From: wopontour at hotmail.com (WopOnTour) Date: Fri, 11 May 2007 20:51:13 -0700 Subject: [Gmecm] Quad Driver currrent capacity? References: <852261.97481.qm@web35312.mail.mud.yahoo.com> Message-ID: GM materials indicate the QDR nodes are each rated for 750mA maximum current WOT ----- Original Message ----- From: "Dig" To: Sent: Friday, May 11, 2007 9:11 AM Subject: [Gmecm] Quad Driver currrent capacity? > Apologies if this is a FAQ... searched the twiki and the archives, > couldn't find anything conclusive. > > Anyobdy have an idea about how much current capacity the quad drivers in a > '749/'730 have? Will they take amps or are they millamp devices. > > I'm looking to PWM drive about 6-7 amps, would prefer not having external > circuitry, but if I gotta, I gotta. > > Thanks, > > Dig > turbodig (at)yahoo.com > code59.org team nerd > RIP Bruce > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > From DOZIERHC at aol.com Sat May 12 15:25:25 2007 From: DOZIERHC at aol.com (DOZIERHC at aol.com) Date: Sat, 12 May 2007 16:25:25 EDT Subject: [Gmecm] Quad Driver currrent capacity? Message-ID: Dig.... I have some spare H-bridge drivers that coukld possibly handle your current capacity, as well as some MOSFETs. If interested, PM me (I'm on code59 as well, so you have my email address from there - KD500-1_EFI)). Hank ------------------------------ Message: 2 Date: Fri, 11 May 2007 11:45:12 -0700 (PDT) From: Dig Subject: Re: [Gmecm] Quad Driver currrent capacity? To: gmecm at diy-efi.org Message-ID: <888637.79715.qm at web35313.mail.mud.yahoo.com> Content-Type: text/plain; charset=ascii Thanks Hank. I'm using it as motor speed control, so the on/off thing is out. Thunkin' out loud... Anybody switched a solid-state DC relay at say, 32hz? http://rocky.digikey.com/WebLib/Crydom/Web%20Data/EZ%20Series.pdf I'm trying to avoid having to wire-up circuits, making PCBs, worrying about heatsinks, etc. Just wire it up, and go. One way to find out, I guess... Dig ************************************** See what's free at http://www.aol.com. From craig.moates at cox.net Mon May 28 20:21:16 2007 From: craig.moates at cox.net (Craig Moates) Date: Mon, 28 May 2007 20:21:16 -0500 Subject: [Gmecm] Too quiet? In-Reply-To: Message-ID: <20070529012559.HHXP6015.eastrmmtao103.cox.net@eastrmimpo02.cox.net> Folks, Did I accidentally unsubscribe, or has it been that quiet lately? Best regards, Craig Moates From mfrels at ix.netcom.com Mon May 28 20:48:05 2007 From: mfrels at ix.netcom.com (Mike Frels) Date: Mon, 28 May 2007 19:48:05 -0600 (GMT-06:00) Subject: [Gmecm] Too quiet? Message-ID: <32047209.1180403285649.JavaMail.root@elwamui-wigeon.atl.sa.earthlink.net> Every year at this late spring going into summer tumeframe all three lists(DIY-EFI, GMECM, and Third-Gen) that I am subscribed to seem to go pretty dead for about a two month stretch. It's almost predictable... Mike -----Original Message----- >From: Craig Moates >Sent: May 28, 2007 7:21 PM >To: gmecm at diy-efi.org >Subject: [Gmecm] Too quiet? > >Folks, > >Did I accidentally unsubscribe, or has it been that quiet lately? > >Best regards, >Craig Moates From davida1 at hiwaay.net Mon May 28 20:58:38 2007 From: davida1 at hiwaay.net (David Allen) Date: Mon, 28 May 2007 20:58:38 -0500 Subject: [Gmecm] Too quiet? References: <20070529012559.HHXP6015.eastrmmtao103.cox.net@eastrmimpo02.cox.net> Message-ID: <001901c7a194$fa3afcb0$8d72a6a6@yancey.com> It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > From carl-otto at usa.net Tue May 29 06:31:37 2007 From: carl-otto at usa.net (CARL-OTTO RUSTAD) Date: Tue, 29 May 2007 13:31:37 +0200 Subject: [Gmecm] Too quiet? Message-ID: <035LeCLEl7326S28.1180438297@cmsweb28.cms.usa.net> Bruce! It has been quiet. I usually listen and learn from this list. All questions asked, no matter what, get almost an immediate response by people with a high level of knowledge. No question to dumb to ask. I appreciate that. Specially when things are beeing discussed with several emails back and forth. Even if I do not have a clue in the beginning, I end up with useful information that's very often based on members knowledge achieved through hours with "tryouts and fails", together with educated knowledge hardly available anywhere else. Regards Carl. ------ Original Message ------ Received: Tue, 29 May 2007 03:26:06 AM CEST From: "Craig Moates" To: Subject: [Gmecm] Too quiet? Folks, Did I accidentally unsubscribe, or has it been that quiet lately? Best regards, Craig Moates _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From lwester at lincsat.com Tue May 29 09:13:24 2007 From: lwester at lincsat.com (Programmer) Date: Tue, 29 May 2007 08:13:24 -0600 Subject: [Gmecm] Too quiet? References: <20070529012559.HHXP6015.eastrmmtao103.cox.net@eastrmimpo02.cox.net> Message-ID: <001301c7a1fb$8ab80f10$0200a8c0@WESTER2> Thought you guys started your long weekend last week... Lyndon ; ) ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 7:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm From captain_krill at yahoo.com Tue May 29 13:05:10 2007 From: captain_krill at yahoo.com (Cowen) Date: Tue, 29 May 2007 11:05:10 -0700 (PDT) Subject: [Gmecm] '7730 Stumbles at cruise Message-ID: <361548.47707.qm@web34304.mail.mud.yahoo.com> Hello folks, It has indeed been quiet, so here's a question to generate some discussion. I've got a stock '730 ECM from a 3.1 running, a 3.4, with injection parts from a Fiero 2.8, with DIS. This setup has been going almost flawlessly for about 2 1/2 years now, and I love the power, mileage, low emissions, and year-round easy starting compared to the carb it replaced. Unfortunately, it has picked up two small issues in the last 6 months or so. First, it stumbles a bit at very light cruise. I have no VSS yet, so I'm pulling a code for that, but nothing else. I have the (digital) EGR vacuum plugged too, but I don't think it enables without VSS anyway. Secondly, when the engine is cold, the there's a bog coming off idle unless it's revved up. This feels like the IAC is closing in response to throttle input. I had this problem when I first got things going, because the throttle plate was adjusted for a 2.8 and the IAC had to overcompensate for the air in a 3.4, so properly adjusting the throttle body completely cured it, until now. I've tried increasing the throttle at idle slightly (reducing IAC counts required), but it hasn't affected the mild bog. I know my setup isn't perfect with no VSS (I'll be transplanting the whole shebang again into an MGA next year anyway), but the thing is it didn't have this stumble for more than a year of operation. I've done a quick check for loose connections at the TPS and IAC and they look good. I can't find any vacuum leaks and it still runs wonderfully otherwise. Any suggestions on what I should focus on? Thanks! ____________________________________________________________________________________Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting From craig.moates at cox.net Tue May 29 13:22:08 2007 From: craig.moates at cox.net (Craig Moates) Date: Tue, 29 May 2007 13:22:08 -0500 Subject: [Gmecm] Too quiet? In-Reply-To: <001901c7a194$fa3afcb0$8d72a6a6@yancey.com> Message-ID: <20070529182651.OSGZ7962.eastrmmtao101.cox.net@eastrmimpo01.cox.net> Yeah, somebody decided to attack our site. But we got it sorted out. I still don't know what drives that sort of thing. Best regards, Craig Moates -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Allen Sent: Monday, May 28, 2007 8:59 PM To: gmecm at diy-efi.org Subject: Re: [Gmecm] Too quiet? It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From mwilson at bwarch.com Tue May 29 13:31:39 2007 From: mwilson at bwarch.com (Mike Wilson) Date: Tue, 29 May 2007 11:31:39 -0700 Subject: [Gmecm] Too quiet? In-Reply-To: <20070529182651.OSGZ7962.eastrmmtao101.cox.net@eastrmimpo01.cox.net> Message-ID: <001f01c7a21f$98bc1f60$1500010a@bwarch.com> Probably an unemployed carburetor salesman with too much time on his hands. -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Craig Moates Sent: Tuesday, May 29, 2007 11:22 AM To: gmecm at diy-efi.org Subject: RE: [Gmecm] Too quiet? Yeah, somebody decided to attack our site. But we got it sorted out. I still don't know what drives that sort of thing. Best regards, Craig Moates -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Allen Sent: Monday, May 28, 2007 8:59 PM To: gmecm at diy-efi.org Subject: Re: [Gmecm] Too quiet? It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From lwester at lincsat.com Tue May 29 14:44:22 2007 From: lwester at lincsat.com (Programmer) Date: Tue, 29 May 2007 13:44:22 -0600 Subject: [Gmecm] Too quiet? References: <20070529182651.OSGZ7962.eastrmmtao101.cox.net@eastrmimpo01.cox.net> Message-ID: <002601c7a229$c7e263d0$0200a8c0@WESTER2> You guys, too ? Seems to be a rampant thing over the past two weeks... Lyndon. ----- Original Message ----- From: "Craig Moates" To: Sent: Tuesday, May 29, 2007 12:22 PM Subject: RE: [Gmecm] Too quiet? > Yeah, somebody decided to attack our site. But we got it sorted out. I > still > don't know what drives that sort of thing. > > Best regards, > Craig Moates > > > -----Original Message----- > From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On > Behalf > Of David Allen > Sent: Monday, May 28, 2007 8:59 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] Too quiet? > > It's been quiet. Hey I tried to access your site yesterday and got a not > found error. > Thanks, > David > > ----- Original Message ----- > From: "Craig Moates" > To: > Sent: Monday, May 28, 2007 8:21 PM > Subject: [Gmecm] Too quiet? > > >> Folks, >> >> Did I accidentally unsubscribe, or has it been that quiet lately? >> >> Best regards, >> Craig Moates >> >> _______________________________________________ >> Gmecm mailing list >> Gmecm at diy-efi.org >> Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm >> Main WWW page: http://www.diy-efi.org/gmecm >> >> > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm From dvfagan at yahoo.com Tue May 29 18:53:29 2007 From: dvfagan at yahoo.com (DV Fagan) Date: Tue, 29 May 2007 16:53:29 -0700 (PDT) Subject: [Gmecm] '7730 Stumbles at cruise In-Reply-To: <361548.47707.qm@web34304.mail.mud.yahoo.com> Message-ID: <876599.16456.qm@web30303.mail.mud.yahoo.com> Cowen, Check your IAC passages for carbon or gunk. Check your TPS for proper values. Dennis --- Cowen wrote: > Hello folks, > > It has indeed been quiet, so here's a question to > generate some discussion. > > I've got a stock '730 ECM from a 3.1 running, a 3.4, > with injection parts from a Fiero 2.8, with DIS. > This setup has been going almost flawlessly for > about 2 1/2 years now, and I love the power, > mileage, low emissions, and year-round easy starting > compared to the carb it replaced. > > Unfortunately, it has picked up two small issues in > the last 6 months or so. First, it stumbles a bit > at very light cruise. I have no VSS yet, so I'm > pulling a code for that, but nothing else. I have > the (digital) EGR vacuum plugged too, but I don't > think it enables without VSS anyway. > > Secondly, when the engine is cold, the there's a bog > coming off idle unless it's revved up. This feels > like the IAC is closing in response to throttle > input. I had this problem when I first got things > going, because the throttle plate was adjusted for a > 2.8 and the IAC had to overcompensate for the air in > a 3.4, so properly adjusting the throttle body > completely cured it, until now. I've tried > increasing the throttle at idle slightly (reducing > IAC counts required), but it hasn't affected the > mild bog. > > I know my setup isn't perfect with no VSS (I'll be > transplanting the whole shebang again into an MGA > next year anyway), but the thing is it didn't have > this stumble for more than a year of operation. > I've done a quick check for loose connections at the > TPS and IAC and they look good. I can't find any > vacuum leaks and it still runs wonderfully > otherwise. > > Any suggestions on what I should focus on? > > Thanks! > > > > ____________________________________________________________________________________Building > a website is a piece of cake. Yahoo! Small Business > gives you all the tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: > http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > ____________________________________________________________________________________ 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! Search movie showtime shortcut. http://tools.search.yahoo.com/shortcuts/#news From lwester at lincsat.com Wed May 30 09:52:39 2007 From: lwester at lincsat.com (Programmer) Date: Wed, 30 May 2007 08:52:39 -0600 Subject: [Gmecm] '7730 Stumbles at cruise References: <361548.47707.qm@web34304.mail.mud.yahoo.com> Message-ID: <003301c7a2ca$31091200$0200a8c0@WESTER2> Provided fuel pressure, ignition, and everything else is fine, Without VSS, the ECM 'assumes' a couple things related to IAC strategy...so you might want to get that working....even though its been flawless for 2.5 year, you can make it even more flawless. LW ----- Original Message ----- From: "Cowen" To: Sent: Tuesday, May 29, 2007 12:05 PM Subject: [Gmecm] '7730 Stumbles at cruise > Hello folks, > > It has indeed been quiet, so here's a question to generate some > discussion. > > I've got a stock '730 ECM from a 3.1 running, a 3.4, with injection parts > from a Fiero 2.8, with DIS. This setup has been going almost flawlessly > for about 2 1/2 years now, and I love the power, mileage, low emissions, > and year-round easy starting compared to the carb it replaced. > > Unfortunately, it has picked up two small issues in the last 6 months or > so. First, it stumbles a bit at very light cruise. I have no VSS yet, so > I'm pulling a code for that, but nothing else. I have the (digital) EGR > vacuum plugged too, but I don't think it enables without VSS anyway. > > Secondly, when the engine is cold, the there's a bog coming off idle > unless it's revved up. This feels like the IAC is closing in response to > throttle input. I had this problem when I first got things going, because > the throttle plate was adjusted for a 2.8 and the IAC had to > overcompensate for the air in a 3.4, so properly adjusting the throttle > body completely cured it, until now. I've tried increasing the throttle > at idle slightly (reducing IAC counts required), but it hasn't affected > the mild bog. > > I know my setup isn't perfect with no VSS (I'll be transplanting the whole > shebang again into an MGA next year anyway), but the thing is it didn't > have this stumble for more than a year of operation. I've done a quick > check for loose connections at the TPS and IAC and they look good. I > can't find any vacuum leaks and it still runs wonderfully otherwise. > > Any suggestions on what I should focus on? > > Thanks! > > > > ____________________________________________________________________________________Building > a website is a piece of cake. Yahoo! Small Business gives you all the > tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm From captain_krill at yahoo.com Wed May 30 14:18:26 2007 From: captain_krill at yahoo.com (Cowen) Date: Wed, 30 May 2007 12:18:26 -0700 (PDT) Subject: [Gmecm] Re: Stumbling '7730 Message-ID: <519791.82589.qm@web34315.mail.mud.yahoo.com> Thanks for the suggestions folks, I'll clean the whole IAC and throttle body, see if that helps. As to VSS, I do want one, so I installed an optical VSS (fit right onto my AMC speedo), but I haven't got the goodies together yet to tell the ECM to look for optical instead of magnetic! I was hoping it might half work, even though the pulses per mile are wrong. AT least the ECM would know when I was moving or not... Apparenly though, it made no difference hooking up the optical VSS. When I transfer the whole business into the MGA next spring, it'll be coupled to a T5 from a Camaro, so the T5 should have a magnetic VSS (I think). **********************END TRANSMISSION********************** ----- Original Message ---- From: "gmecm-request at diy-efi.org" To: gmecm at diy-efi.org Sent: Wednesday, May 30, 2007 10:20:09 AM Subject: Gmecm Digest, Vol 27, Issue 14 Send Gmecm mailing list submissions to gmecm at diy-efi.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.diy-efi.org/mailman/listinfo/gmecm or, via email, send a message with subject or body 'help' to gmecm-request at diy-efi.org You can reach the person managing the list at gmecm-owner at diy-efi.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Gmecm digest..." Today's Topics: 1. '7730 Stumbles at cruise (Cowen) 2. RE: Too quiet? (Craig Moates) 3. RE: Too quiet? (Mike Wilson) 4. Re: Too quiet? (Programmer) 5. Re: '7730 Stumbles at cruise (DV Fagan) 6. Re: '7730 Stumbles at cruise (Programmer) Hello folks, It has indeed been quiet, so here's a question to generate some discussion. I've got a stock '730 ECM from a 3.1 running, a 3.4, with injection parts from a Fiero 2.8, with DIS. This setup has been going almost flawlessly for about 2 1/2 years now, and I love the power, mileage, low emissions, and year-round easy starting compared to the carb it replaced. Unfortunately, it has picked up two small issues in the last 6 months or so. First, it stumbles a bit at very light cruise. I have no VSS yet, so I'm pulling a code for that, but nothing else. I have the (digital) EGR vacuum plugged too, but I don't think it enables without VSS anyway. Secondly, when the engine is cold, the there's a bog coming off idle unless it's revved up. This feels like the IAC is closing in response to throttle input. I had this problem when I first got things going, because the throttle plate was adjusted for a 2.8 and the IAC had to overcompensate for the air in a 3.4, so properly adjusting the throttle body completely cured it, until now. I've tried increasing the throttle at idle slightly (reducing IAC counts required), but it hasn't affected the mild bog. I know my setup isn't perfect with no VSS (I'll be transplanting the whole shebang again into an MGA next year anyway), but the thing is it didn't have this stumble for more than a year of operation. I've done a quick check for loose connections at the TPS and IAC and they look good. I can't find any vacuum leaks and it still runs wonderfully otherwise. Any suggestions on what I should focus on? Thanks! ____________________________________________________________________________________Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting Yeah, somebody decided to attack our site. But we got it sorted out. I still don't know what drives that sort of thing. Best regards, Craig Moates -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Allen Sent: Monday, May 28, 2007 8:59 PM To: gmecm at diy-efi.org Subject: Re: [Gmecm] Too quiet? It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm Probably an unemployed carburetor salesman with too much time on his hands. -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Craig Moates Sent: Tuesday, May 29, 2007 11:22 AM To: gmecm at diy-efi.org Subject: RE: [Gmecm] Too quiet? Yeah, somebody decided to attack our site. But we got it sorted out. I still don't know what drives that sort of thing. Best regards, Craig Moates -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Allen Sent: Monday, May 28, 2007 8:59 PM To: gmecm at diy-efi.org Subject: Re: [Gmecm] Too quiet? It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm You guys, too ? Seems to be a rampant thing over the past two weeks... Lyndon. ----- Original Message ----- From: "Craig Moates" To: Sent: Tuesday, May 29, 2007 12:22 PM Subject: RE: [Gmecm] Too quiet? > Yeah, somebody decided to attack our site. But we got it sorted out. I > still > don't know what drives that sort of thing. > > Best regards, > Craig Moates > > > -----Original Message----- > From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On > Behalf > Of David Allen > Sent: Monday, May 28, 2007 8:59 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] Too quiet? > > It's been quiet. Hey I tried to access your site yesterday and got a not > found error. > Thanks, > David > > ----- Original Message ----- > From: "Craig Moates" > To: > Sent: Monday, May 28, 2007 8:21 PM > Subject: [Gmecm] Too quiet? > > >> Folks, >> >> Did I accidentally unsubscribe, or has it been that quiet lately? >> >> Best regards, >> Craig Moates >> >> _______________________________________________ >> Gmecm mailing list >> Gmecm at diy-efi.org >> Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm >> Main WWW page: http://www.diy-efi.org/gmecm >> >> > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm Cowen, Check your IAC passages for carbon or gunk. Check your TPS for proper values. Dennis --- Cowen wrote: > Hello folks, > > It has indeed been quiet, so here's a question to > generate some discussion. > > I've got a stock '730 ECM from a 3.1 running, a 3.4, > with injection parts from a Fiero 2.8, with DIS. > This setup has been going almost flawlessly for > about 2 1/2 years now, and I love the power, > mileage, low emissions, and year-round easy starting > compared to the carb it replaced. > > Unfortunately, it has picked up two small issues in > the last 6 months or so. First, it stumbles a bit > at very light cruise. I have no VSS yet, so I'm > pulling a code for that, but nothing else. I have > the (digital) EGR vacuum plugged too, but I don't > think it enables without VSS anyway. > > Secondly, when the engine is cold, the there's a bog > coming off idle unless it's revved up. This feels > like the IAC is closing in response to throttle > input. I had this problem when I first got things > going, because the throttle plate was adjusted for a > 2.8 and the IAC had to overcompensate for the air in > a 3.4, so properly adjusting the throttle body > completely cured it, until now. I've tried > increasing the throttle at idle slightly (reducing > IAC counts required), but it hasn't affected the > mild bog. > > I know my setup isn't perfect with no VSS (I'll be > transplanting the whole shebang again into an MGA > next year anyway), but the thing is it didn't have > this stumble for more than a year of operation. > I've done a quick check for loose connections at the > TPS and IAC and they look good. I can't find any > vacuum leaks and it still runs wonderfully > otherwise. > > Any suggestions on what I should focus on? > > Thanks! > > > > ____________________________________________________________________________________Building > a website is a piece of cake. Yahoo! Small Business > gives you all the tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: > http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > ____________________________________________________________________________________ 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! Search movie showtime shortcut. http://tools.search.yahoo.com/shortcuts/#news Provided fuel pressure, ignition, and everything else is fine, Without VSS, the ECM 'assumes' a couple things related to IAC strategy...so you might want to get that working....even though its been flawless for 2.5 year, you can make it even more flawless. LW ----- Original Message ----- From: "Cowen" To: Sent: Tuesday, May 29, 2007 12:05 PM Subject: [Gmecm] '7730 Stumbles at cruise > Hello folks, > > It has indeed been quiet, so here's a question to generate some > discussion. > > I've got a stock '730 ECM from a 3.1 running, a 3.4, with injection parts > from a Fiero 2.8, with DIS. This setup has been going almost flawlessly > for about 2 1/2 years now, and I love the power, mileage, low emissions, > and year-round easy starting compared to the carb it replaced. > > Unfortunately, it has picked up two small issues in the last 6 months or > so. First, it stumbles a bit at very light cruise. I have no VSS yet, so > I'm pulling a code for that, but nothing else. I have the (digital) EGR > vacuum plugged too, but I don't think it enables without VSS anyway. > > Secondly, when the engine is cold, the there's a bog coming off idle > unless it's revved up. This feels like the IAC is closing in response to > throttle input. I had this problem when I first got things going, because > the throttle plate was adjusted for a 2.8 and the IAC had to > overcompensate for the air in a 3.4, so properly adjusting the throttle > body completely cured it, until now. I've tried increasing the throttle > at idle slightly (reducing IAC counts required), but it hasn't affected > the mild bog. > > I know my setup isn't perfect with no VSS (I'll be transplanting the whole > shebang again into an MGA next year anyway), but the thing is it didn't > have this stumble for more than a year of operation. I've done a quick > check for loose connections at the TPS and IAC and they look good. I > can't find any vacuum leaks and it still runs wonderfully otherwise. > > Any suggestions on what I should focus on? > > Thanks! > > > > ____________________________________________________________________________________Building > a website is a piece of cake. Yahoo! Small Business gives you all the > tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/gmecm ____________________________________________________________________________________ Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/ From mwilson at bwarch.com Wed May 30 14:35:21 2007 From: mwilson at bwarch.com (Mike Wilson) Date: Wed, 30 May 2007 12:35:21 -0700 Subject: [Gmecm] Re: Stumbling '7730 In-Reply-To: <519791.82589.qm@web34315.mail.mud.yahoo.com> Message-ID: <000801c7a2f1$a9adb4a0$1500010a@bwarch.com> I found a dual output VSS that came on 1993 Caprice cop cars is still available from several local auto parts stores. NAPA # VSS231 or CSK #DR1044 is what I used. It was around $60. It has the VSS output for the ECM and a mechanical speedometer cable drive that was used for a mechanically driven radar gun. It worked great when I put a 4L60 & LT1 into my 67 Chevelle with the original mechanical speedometer. You will just need a conversion speedometer cable made for your current setup if the AMC transmission connection is different and later one made for the MG swap to use the original MG speedometer. Hope this helps, Mike -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Cowen Sent: Wednesday, May 30, 2007 12:18 PM To: gmecm at diy-efi.org Subject: [Gmecm] Re: Stumbling '7730 Thanks for the suggestions folks, I'll clean the whole IAC and throttle body, see if that helps. As to VSS, I do want one, so I installed an optical VSS (fit right onto my AMC speedo), but I haven't got the goodies together yet to tell the ECM to look for optical instead of magnetic! I was hoping it might half work, even though the pulses per mile are wrong. AT least the ECM would know when I was moving or not... Apparenly though, it made no difference hooking up the optical VSS. When I transfer the whole business into the MGA next spring, it'll be coupled to a T5 from a Camaro, so the T5 should have a magnetic VSS (I think). **********************END TRANSMISSION********************** ----- Original Message ---- From: "gmecm-request at diy-efi.org" To: gmecm at diy-efi.org Sent: Wednesday, May 30, 2007 10:20:09 AM Subject: Gmecm Digest, Vol 27, Issue 14 Send Gmecm mailing list submissions to gmecm at diy-efi.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.diy-efi.org/mailman/listinfo/gmecm or, via email, send a message with subject or body 'help' to gmecm-request at diy-efi.org You can reach the person managing the list at gmecm-owner at diy-efi.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Gmecm digest..." Today's Topics: 1. '7730 Stumbles at cruise (Cowen) 2. RE: Too quiet? (Craig Moates) 3. RE: Too quiet? (Mike Wilson) 4. Re: Too quiet? (Programmer) 5. Re: '7730 Stumbles at cruise (DV Fagan) 6. Re: '7730 Stumbles at cruise (Programmer) Hello folks, It has indeed been quiet, so here's a question to generate some discussion. I've got a stock '730 ECM from a 3.1 running, a 3.4, with injection parts from a Fiero 2.8, with DIS. This setup has been going almost flawlessly for about 2 1/2 years now, and I love the power, mileage, low emissions, and year-round easy starting compared to the carb it replaced. Unfortunately, it has picked up two small issues in the last 6 months or so. First, it stumbles a bit at very light cruise. I have no VSS yet, so I'm pulling a code for that, but nothing else. I have the (digital) EGR vacuum plugged too, but I don't think it enables without VSS anyway. Secondly, when the engine is cold, the there's a bog coming off idle unless it's revved up. This feels like the IAC is closing in response to throttle input. I had this problem when I first got things going, because the throttle plate was adjusted for a 2.8 and the IAC had to overcompensate for the air in a 3.4, so properly adjusting the throttle body completely cured it, until now. I've tried increasing the throttle at idle slightly (reducing IAC counts required), but it hasn't affected the mild bog. I know my setup isn't perfect with no VSS (I'll be transplanting the whole shebang again into an MGA next year anyway), but the thing is it didn't have this stumble for more than a year of operation. I've done a quick check for loose connections at the TPS and IAC and they look good. I can't find any vacuum leaks and it still runs wonderfully otherwise. Any suggestions on what I should focus on? Thanks! ____________________________________________________________________________ ________Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting Yeah, somebody decided to attack our site. But we got it sorted out. I still don't know what drives that sort of thing. Best regards, Craig Moates -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Allen Sent: Monday, May 28, 2007 8:59 PM To: gmecm at diy-efi.org Subject: Re: [Gmecm] Too quiet? It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm Probably an unemployed carburetor salesman with too much time on his hands. -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Craig Moates Sent: Tuesday, May 29, 2007 11:22 AM To: gmecm at diy-efi.org Subject: RE: [Gmecm] Too quiet? Yeah, somebody decided to attack our site. But we got it sorted out. I still don't know what drives that sort of thing. Best regards, Craig Moates -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Allen Sent: Monday, May 28, 2007 8:59 PM To: gmecm at diy-efi.org Subject: Re: [Gmecm] Too quiet? It's been quiet. Hey I tried to access your site yesterday and got a not found error. Thanks, David ----- Original Message ----- From: "Craig Moates" To: Sent: Monday, May 28, 2007 8:21 PM Subject: [Gmecm] Too quiet? > Folks, > > Did I accidentally unsubscribe, or has it been that quiet lately? > > Best regards, > Craig Moates > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm You guys, too ? Seems to be a rampant thing over the past two weeks... Lyndon. ----- Original Message ----- From: "Craig Moates" To: Sent: Tuesday, May 29, 2007 12:22 PM Subject: RE: [Gmecm] Too quiet? > Yeah, somebody decided to attack our site. But we got it sorted out. I > still > don't know what drives that sort of thing. > > Best regards, > Craig Moates > > > -----Original Message----- > From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On > Behalf > Of David Allen > Sent: Monday, May 28, 2007 8:59 PM > To: gmecm at diy-efi.org > Subject: Re: [Gmecm] Too quiet? > > It's been quiet. Hey I tried to access your site yesterday and got a not > found error. > Thanks, > David > > ----- Original Message ----- > From: "Craig Moates" > To: > Sent: Monday, May 28, 2007 8:21 PM > Subject: [Gmecm] Too quiet? > > >> Folks, >> >> Did I accidentally unsubscribe, or has it been that quiet lately? >> >> Best regards, >> Craig Moates >> >> _______________________________________________ >> Gmecm mailing list >> Gmecm at diy-efi.org >> Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm >> Main WWW page: http://www.diy-efi.org/gmecm >> >> > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm Cowen, Check your IAC passages for carbon or gunk. Check your TPS for proper values. Dennis --- Cowen wrote: > Hello folks, > > It has indeed been quiet, so here's a question to > generate some discussion. > > I've got a stock '730 ECM from a 3.1 running, a 3.4, > with injection parts from a Fiero 2.8, with DIS. > This setup has been going almost flawlessly for > about 2 1/2 years now, and I love the power, > mileage, low emissions, and year-round easy starting > compared to the carb it replaced. > > Unfortunately, it has picked up two small issues in > the last 6 months or so. First, it stumbles a bit > at very light cruise. I have no VSS yet, so I'm > pulling a code for that, but nothing else. I have > the (digital) EGR vacuum plugged too, but I don't > think it enables without VSS anyway. > > Secondly, when the engine is cold, the there's a bog > coming off idle unless it's revved up. This feels > like the IAC is closing in response to throttle > input. I had this problem when I first got things > going, because the throttle plate was adjusted for a > 2.8 and the IAC had to overcompensate for the air in > a 3.4, so properly adjusting the throttle body > completely cured it, until now. I've tried > increasing the throttle at idle slightly (reducing > IAC counts required), but it hasn't affected the > mild bog. > > I know my setup isn't perfect with no VSS (I'll be > transplanting the whole shebang again into an MGA > next year anyway), but the thing is it didn't have > this stumble for more than a year of operation. > I've done a quick check for loose connections at the > TPS and IAC and they look good. I can't find any > vacuum leaks and it still runs wonderfully > otherwise. > > Any suggestions on what I should focus on? > > Thanks! > > > > ____________________________________________________________________________ ________Building > a website is a piece of cake. Yahoo! Small Business > gives you all the tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: > http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm > ____________________________________________________________________________ ________ 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! Search movie showtime shortcut. http://tools.search.yahoo.com/shortcuts/#news Provided fuel pressure, ignition, and everything else is fine, Without VSS, the ECM 'assumes' a couple things related to IAC strategy...so you might want to get that working....even though its been flawless for 2.5 year, you can make it even more flawless. LW ----- Original Message ----- From: "Cowen" To: Sent: Tuesday, May 29, 2007 12:05 PM Subject: [Gmecm] '7730 Stumbles at cruise > Hello folks, > > It has indeed been quiet, so here's a question to generate some > discussion. > > I've got a stock '730 ECM from a 3.1 running, a 3.4, with injection parts > from a Fiero 2.8, with DIS. This setup has been going almost flawlessly > for about 2 1/2 years now, and I love the power, mileage, low emissions, > and year-round easy starting compared to the carb it replaced. > > Unfortunately, it has picked up two small issues in the last 6 months or > so. First, it stumbles a bit at very light cruise. I have no VSS yet, so > I'm pulling a code for that, but nothing else. I have the (digital) EGR > vacuum plugged too, but I don't think it enables without VSS anyway. > > Secondly, when the engine is cold, the there's a bog coming off idle > unless it's revved up. This feels like the IAC is closing in response to > throttle input. I had this problem when I first got things going, because > the throttle plate was adjusted for a 2.8 and the IAC had to > overcompensate for the air in a 3.4, so properly adjusting the throttle > body completely cured it, until now. I've tried increasing the throttle > at idle slightly (reducing IAC counts required), but it hasn't affected > the mild bog. > > I know my setup isn't perfect with no VSS (I'll be transplanting the whole > shebang again into an MGA next year anyway), but the thing is it didn't > have this stumble for more than a year of operation. I've done a quick > check for loose connections at the TPS and IAC and they look good. I > can't find any vacuum leaks and it still runs wonderfully otherwise. > > Any suggestions on what I should focus on? > > Thanks! > > > > ____________________________________________________________________________ ________Building > a website is a piece of cake. Yahoo! Small Business gives you all the > tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Gmecm mailing list > Gmecm at diy-efi.org > Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm > Main WWW page: http://www.diy-efi.org/gmecm _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/gmecm ____________________________________________________________________________ ________ Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/ _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From DOZIERHC at aol.com Wed May 30 15:48:28 2007 From: DOZIERHC at aol.com (DOZIERHC at aol.com) Date: Wed, 30 May 2007 16:48:28 EDT Subject: [Gmecm] Re: Stumbling '7730 - VSS solution from 93 Caprice Cop Car? Message-ID: Mike... Know what the connectors on that VSS are? Any part numbers on them, or what PN could be referenced from a place like GMPartsDirect.com? Hank In a message dated 5/30/2007 3:39:53 P.M. Eastern Daylight Time, gmecm-request at diy-efi.org writes: Date: Wed, 30 May 2007 12:35:21 -0700 From: "Mike Wilson" Subject: RE: [Gmecm] Re: Stumbling '7730 To: Message-ID: <000801c7a2f1$a9adb4a0$1500010a at bwarch.com> Content-Type: text/plain; charset="us-ascii" I found a dual output VSS that came on 1993 Caprice cop cars is still available from several local auto parts stores. NAPA # VSS231 or CSK #DR1044 is what I used. It was around $60. It has the VSS output for the ECM and a mechanical speedometer cable drive that was used for a mechanically driven radar gun. It worked great when I put a 4L60 & LT1 into my 67 Chevelle with the original mechanical speedometer. You will just need a conversion speedometer cable made for your current setup if the AMC transmission connection is different and later one made for the MG swap to use the original MG speedometer. Hope this helps, Mike ************************************** See what's free at http://www.aol.com. From mwilson at bwarch.com Wed May 30 16:11:17 2007 From: mwilson at bwarch.com (Mike Wilson) Date: Wed, 30 May 2007 14:11:17 -0700 Subject: [Gmecm] Re: Stumbling '7730 - VSS solution from 93 Caprice Cop Car? In-Reply-To: Message-ID: <001701c7a2ff$10751fe0$1500010a@bwarch.com> I just used the factory LT1 wire harness connector. It looks the same as all the other 700R4 & 4L60 VSS plugs that I have seen though so you could find it on many vehicles at the wrecking yard. I have found that most Astro & Safari vans are a good source for 4L60 and 4L60E parts. The mechanical speedometer connector was the standard old GM part, nothing fancy. Pretty much any 60's to mid 80's GM car would be a good donor. Hope this helps, Mike -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of DOZIERHC at aol.com Sent: Wednesday, May 30, 2007 1:48 PM To: gmecm at diy-efi.org Subject: [Gmecm] Re: Stumbling '7730 - VSS solution from 93 Caprice Cop Car? Mike... Know what the connectors on that VSS are? Any part numbers on them, or what PN could be referenced from a place like GMPartsDirect.com? Hank In a message dated 5/30/2007 3:39:53 P.M. Eastern Daylight Time, gmecm-request at diy-efi.org writes: Date: Wed, 30 May 2007 12:35:21 -0700 From: "Mike Wilson" Subject: RE: [Gmecm] Re: Stumbling '7730 To: Message-ID: <000801c7a2f1$a9adb4a0$1500010a at bwarch.com> Content-Type: text/plain; charset="us-ascii" I found a dual output VSS that came on 1993 Caprice cop cars is still available from several local auto parts stores. NAPA # VSS231 or CSK #DR1044 is what I used. It was around $60. It has the VSS output for the ECM and a mechanical speedometer cable drive that was used for a mechanically driven radar gun. It worked great when I put a 4L60 & LT1 into my 67 Chevelle with the original mechanical speedometer. You will just need a conversion speedometer cable made for your current setup if the AMC transmission connection is different and later one made for the MG swap to use the original MG speedometer. Hope this helps, Mike ************************************** See what's free at http://www.aol.com. _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm From dennysweet at charter.net Wed May 30 18:31:53 2007 From: dennysweet at charter.net (Denny) Date: Wed, 30 May 2007 16:31:53 -0700 Subject: [Gmecm] Re: Stumbling '7730 References: <519791.82589.qm@web34315.mail.mud.yahoo.com> Message-ID: <000f01c7a312$b52295f0$2e02a8c0@dennyhuyir5nuj> You mean to tell me you put fuel injection on an AMC motor? I have been looking for away to do that for my offroad truck. Would like to find out how you accomplished that! Denny From captain_krill at yahoo.com Thu May 31 12:58:05 2007 From: captain_krill at yahoo.com (Cowen) Date: Thu, 31 May 2007 10:58:05 -0700 (PDT) Subject: [Gmecm] FI on AMC motor Message-ID: <20070531175805.59120.qmail@web34309.mail.mud.yahoo.com> Hello Denny, I've got an '84 Cherokee XJ, which came from the factory with a Chevy 2.8l. When I switched up to a 3.4l at 400,000kms, I used the worn out carb for 2 years then went for FI. I initially planned to put in TBI, thinking it would be easier for a beginner, but TBI is too tall for the Cherokee hood to close. Complete MPFI motor and harness from a Fiero came along at the right time/right price, with no ECM or EGR. A repinned connector later and it's running with a '7730. This conversion has been so successful, I'm now casually looking for a complete 454 TBI setup to put on a Buick 455. Checkout customefis.com for info on injecting an SJ. I can't find it on his sight now, but he used to have photos etc. using TBI. Duncan **********************END TRANSMISSION********************** ----- Original Message ---- From: "gmecm-request at diy-efi.org" To: gmecm at diy-efi.org Sent: Thursday, May 31, 2007 10:00:07 AM Subject: Gmecm Digest, Vol 27, Issue 16 Send Gmecm mailing list submissions to gmecm at diy-efi.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.diy-efi.org/mailman/listinfo/gmecm or, via email, send a message with subject or body 'help' to gmecm-request at diy-efi.org You can reach the person managing the list at gmecm-owner at diy-efi.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Gmecm digest..." Today's Topics: 1. Re: Stumbling '7730 - VSS solution from 93 Caprice Cop Car? (DOZIERHC at aol.com) 2. RE: Re: Stumbling '7730 - VSS solution from 93 Caprice Cop Car? (Mike Wilson) 3. Re: Re: Stumbling '7730 (Denny) Mike... Know what the connectors on that VSS are? Any part numbers on them, or what PN could be referenced from a place like GMPartsDirect.com? Hank In a message dated 5/30/2007 3:39:53 P.M. Eastern Daylight Time, gmecm-request at diy-efi.org writes: Date: Wed, 30 May 2007 12:35:21 -0700 From: "Mike Wilson" Subject: RE: [Gmecm] Re: Stumbling '7730 To: Message-ID: <000801c7a2f1$a9adb4a0$1500010a at bwarch.com> Content-Type: text/plain; charset="us-ascii" I found a dual output VSS that came on 1993 Caprice cop cars is still available from several local auto parts stores. NAPA # VSS231 or CSK #DR1044 is what I used. It was around $60. It has the VSS output for the ECM and a mechanical speedometer cable drive that was used for a mechanically driven radar gun. It worked great when I put a 4L60 & LT1 into my 67 Chevelle with the original mechanical speedometer. You will just need a conversion speedometer cable made for your current setup if the AMC transmission connection is different and later one made for the MG swap to use the original MG speedometer. Hope this helps, Mike ************************************** See what's free at http://www.aol.com. I just used the factory LT1 wire harness connector. It looks the same as all the other 700R4 & 4L60 VSS plugs that I have seen though so you could find it on many vehicles at the wrecking yard. I have found that most Astro & Safari vans are a good source for 4L60 and 4L60E parts. The mechanical speedometer connector was the standard old GM part, nothing fancy. Pretty much any 60's to mid 80's GM car would be a good donor. Hope this helps, Mike -----Original Message----- From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of DOZIERHC at aol.com Sent: Wednesday, May 30, 2007 1:48 PM To: gmecm at diy-efi.org Subject: [Gmecm] Re: Stumbling '7730 - VSS solution from 93 Caprice Cop Car? Mike... Know what the connectors on that VSS are? Any part numbers on them, or what PN could be referenced from a place like GMPartsDirect.com? Hank In a message dated 5/30/2007 3:39:53 P.M. Eastern Daylight Time, gmecm-request at diy-efi.org writes: Date: Wed, 30 May 2007 12:35:21 -0700 From: "Mike Wilson" Subject: RE: [Gmecm] Re: Stumbling '7730 To: Message-ID: <000801c7a2f1$a9adb4a0$1500010a at bwarch.com> Content-Type: text/plain; charset="us-ascii" I found a dual output VSS that came on 1993 Caprice cop cars is still available from several local auto parts stores. NAPA # VSS231 or CSK #DR1044 is what I used. It was around $60. It has the VSS output for the ECM and a mechanical speedometer cable drive that was used for a mechanically driven radar gun. It worked great when I put a 4L60 & LT1 into my 67 Chevelle with the original mechanical speedometer. You will just need a conversion speedometer cable made for your current setup if the AMC transmission connection is different and later one made for the MG swap to use the original MG speedometer. Hope this helps, Mike ************************************** See what's free at http://www.aol.com. _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm Main WWW page: http://www.diy-efi.org/gmecm You mean to tell me you put fuel injection on an AMC motor? I have been looking for away to do that for my offroad truck. Would like to find out how you accomplished that! Denny _______________________________________________ Gmecm mailing list Gmecm at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/gmecm ____________________________________________________________________________________ Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. http://sims.yahoo.com/