[Diy_efi] Starting point
SEAN FOGG
sfogg
Sat Nov 12 17:38:59 UTC 2005
Hi all,
I'm 100% new to the whole "doing-stuff-to-EFI" scene. At present, I've just completed a '92 GM 3.4TDC swap into a pontiac fiero, using a modified (by someone else) stock CALPAK (i.e., reprogram the auto memcal with a manual memcal image?). I would very much like to dive into this component myself, since there are unspeakable things I'd like to do to the motor that I'm sure the stock programming is NOT going to like.
As it sits, I know now that I can successfully wire a full engine harness from scratch... But that's about it. Specifically, I want to know how to a) monitor the ECM, b) Read the memcal, and c) Program the memcal.
I don't know much about the DIY-EFI mailing list, except that a large number of links on the main page are dead ( :( ), and I wouldn't know where to start in order to search the archives...
So, that being said, what can I use to (in realtime, or hell, even just a datalog) read the 8192 baud ALDL output? I know of several tools that will read the older style 192baud stream from the stock Fiero ECM... But I can't find anything on how to read it off a 91-93 TDC.
Any resources would be greatly appreciated. I'm not too bad with a soldering iron, so any schematics on how to make an appropriate interface would be greatly appreciated, as well as a direction on software that I can use to read the stream.
I won't concern myself much with actually editing the memcal until I can get a better understanding of what is going on in the motor's little head under any conceivable condition.
Thanks in advance
Sean
----- Original Message -----
From: diy_efi-request at diy-efi.org
Date: Saturday, November 12, 2005 11:00 am
Subject: Diy_efi Digest, Vol 9, Issue 8
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> Today's Topics:
>
> 1. Dual TBI ECM mods (David Rowley)
> 2. Re: Dual TBI ECM mods (jlg-sep at comcast.net)
> 3. Re: Dual TBI ECM mods (David Rowley)
> 4. Re: Dual TBI ECM mods (jlg-sep at comcast.net)
> 5. Re: GM number for TBI FP Diaphragm (Martin E)
> 6. Iridium plug problems (Tim Marsteiner)
> 7. RE: Iridium plug problems (Tim Marsteiner)
>
>
> -------------------------------------------------------------------
> ---
>
> Message: 1
> Date: Wed, 9 Nov 2005 12:53:04 -0800 (PST)
> From: David Rowley <david_rowley2003 at yahoo.com>
> Subject: [Diy_efi] Dual TBI ECM mods
> To: Diy_efi at diy-efi.org
> Message-ID: <20051109205304.33988.qmail at web60923.mail.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi all,
>
> I am new to this and I suspect this subject has already been
> discussed, so I hope no one will mind me possibly bringing it up
> again...
> My question is this: I want to use a 1227747 ECM with 2 TBI
> units. In other words, I need the ECM to work with 4 injectors
> instead of the normal 2. Does anyone know what changes need to be
> made to the ECM to drive the additional injectors?
>
> Thanks.
>
>
> ---------------------------------
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> ------------------------------
>
> Message: 2
> Date: Wed, 09 Nov 2005 21:24:45 +0000
> From: jlg-sep at comcast.net
> Subject: Re: [Diy_efi] Dual TBI ECM mods
> To: diy_efi at diy-efi.org
> Message-ID:
> <110920052124.8401.4372691D000426A9000020D122007589429F0A9CD3090406 at comcast.net>
>
> Content-Type: text/plain; charset="us-ascii"
>
> > I am new to this and I suspect this subject has already been
> discussed,> so I hope no one will mind me possibly bringing it up
> again...>
> > My question is this: I want to use a 1227747 ECM with 2 TBI
> units. In
> > other words, I need the ECM to work with 4 injectors instead of
> the normal
> > 2. Does anyone know what changes need to be made to the ECM to
> drive> the additional injectors?
>
> Reference the following schematic from Ludis' site:
>
> http://www.cruzers.com/~ludis/1228746sheet5.gif
>
> At an absolute minimum, you need to remove R79 and R80 (Left and Right
> injector current sense resistors) and replace them with .05ohm 1%
> units.I've been using the Ohmite 3W version, available from
> Digikey under p/n
> 13FR050-ND. You will then be able to run the second TBI injectors in
> parallel with the first while still retaining proper peak and hold
> operation.
> -Scott
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> ------------------------------
>
> Message: 3
> Date: Thu, 10 Nov 2005 07:37:50 -0800 (PST)
> From: David Rowley <david_rowley2003 at yahoo.com>
> Subject: Re: [Diy_efi] Dual TBI ECM mods
> To: diy_efi at diy-efi.org
> Message-ID: <20051110153750.28305.qmail at web60924.mail.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> That sounds pretty simple. I take it that the transistors (Q9 and
> Q10) can handle the additional current they are being asked to
> supply (double), would that be true? Or would I need a different
> transistor that can handle the additional current. Thanks for the
> help.
> Dave
>
>
> jlg-sep at comcast.net wrote:
> > I am new to this and I suspect this subject has already been
> discussed,> so I hope no one will mind me possibly bringing it up
> again...>
> > My question is this: I want to use a 1227747 ECM with 2 TBI
> units. In
> > other words, I need the ECM to work with 4 injectors instead of
> the normal
> > 2. Does anyone know what changes need to be made to the ECM to
> drive> the additional injectors?
>
> Reference the following schematic from Ludis' site:
>
> http://www.cruzers.com/~ludis/1228746sheet5.gif
>
> At an absolute minimum, you need to remove R79 and R80 (Left and Right
> injector current sense resistors) and replace them with .05ohm 1%
> units.I've been using the Ohmite 3W version, available from
> Digikey under p/n
> 13FR050-ND. You will then be able to run the second TBI injectors in
> parallel with the first while still retaining proper peak and hold
> operation.
> -Scott
>
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>
>
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> ------------------------------
>
> Message: 4
> Date: Thu, 10 Nov 2005 16:03:02 +0000
> From: jlg-sep at comcast.net
> Subject: Re: [Diy_efi] Dual TBI ECM mods
> To: diy_efi at diy-efi.org
> Message-ID:
> <111020051603.16775.43736F360005FC4D0000418722070016419F0A9CD3090406 at comcast.net>
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> Subject: Re: [Diy_efi] Dual TBI ECM mods
> Date: Thu, 10 Nov 2005 15:38:51 +0000
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> ------------------------------
>
> Message: 5
> Date: Fri, 11 Nov 2005 20:59:34 -0500
> From: "Martin E" <martine001 at verizon.net>
> Subject: Re: [Diy_efi] GM number for TBI FP Diaphragm
> To: <diy_efi at diy-efi.org>
> Message-ID: <001401c5e72c$bb2fb390$2c01a8c0 at MARTINE>
> Content-Type: text/plain; charset=iso-8859-1
>
> Advance Auto parts.
> Neihof P/N 21732 - Diaphragm and fuel injector horn gasket. $29
> Borgwarner P/N 21732 $50
>
> But, I have a Borgwarner kit here and the number is 10902. Its a
> completerebuild kit $23 availble from Advance.
>
> Also, Holley 512-1 is the diaphragm alone (looks like the same
> fit). $29
> online somewhere.
>
> Looks like I'll order the 10902. Anyone need a acdelco 40-683
> gasket kit (no
> diaphragm)?
>
>
>
> Cheers
> ----- Original Message -----
> From: "Martin E" <martine001 at verizon.net>
> To: "Dustin Lof" <bubblesjrtwo at yahoo.com>
> Sent: Friday, November 11, 2005 7:28 PM
> Subject: Re: [Diy_efi] GM number for TBI FP Diaphragm
>
>
> > Advance Auto parts.
> > Neihof P/N 21732 - Diaphragm and fuel injector horn gasket. $29
> > Borgwarner P/N 21732 $50
> >
> > But, I have a Borgwaner kit here and the number is 10902. Its a
> complete> rebuild kit $40.
> >
> > Also, Holley 512-1 is the diaphragm alone (looks like the same
> fit). $29
> > online somewhere.
> >
> > But I allready have the ACD 40-683, which is a partial rebuild
> kit $40 (no
> > diaphragm and injector filters)
> >
> > Cheers
> >
> > ----- Original Message -----
> > From: "Dustin Lof" <bubblesjrtwo at yahoo.com>
> > To: "Martin E" <martine001 at verizon.net>
> > Sent: Thursday, November 10, 2005 11:38 PM
> > Subject: Re: [Diy_efi] GM number for TBI FP Diaphragm
> >
> >
> > > I had some time to research this it looks like from
> > > Delco it comes with the fuel meter cover p/n 217-382
> > > $140
> > > Napa p/n mpf 31732 fuel pressure regulator (just a
> > > diaphram)for $50
> > > napa p/n crb 21732 pressure regulator kit (diaphram
> > > and fuel meter gaskets)$70
> > > Napa p/n crb 21752 tune up kit (I have one in front of
> > > me and it has the diaphram)$34
> > >
> > > if you dont have a napa near by I'm sure my napa will
> > > ship to you, if they wont I will, maybee through ebay
> > > let me know, I wouldnt mind the feedback.
> > > --- Martin E <martine001 at verizon.net> wrote:
> > >
> > > > Dustin,
> > > >
> > > > I did look it up on www.acdelco.com but I was told
> > > > its a spring @ $3.xx ea.
> > > > Seems odd. It does not look like a GM part after
> > > > all. My local guy cant get
> > > > em.
> > > > Maybe the Holley version is the same fit?
> > > >
> > > > Turbocity @ $22 Or its off to the dealer for more?
> > > >
> > > > Cheers
> > > >
> > > > ----- Original Message -----
> > > > From: "Dustin Lof" <bubblesjrtwo at yahoo.com>
> > > > To: "Martin E" <martine001 at verizon.net>;
> > > > <diy_efi at diy-efi.org>
> > > > Sent: Tuesday, November 08, 2005 10:44 PM
> > > > Subject: Re: [Diy_efi] GM number for TBI FP
> > > > Diaphragm
> > > >
> > > >
> > > > >
> > > > > if you know a make and model it can be looked up
> > > > on
> > > > > the delco website
> > > > >
> > > > > http://www.acdelco.com/html/catalog/
> > > > > you should be able to copy and paste this address
> > > > > --- Martin E <martine001 at verizon.net> wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > Anyone here know what the GM part number for the
> > > > > > Fuel Pressure Diaphragm is on the TBI220?
> > > > > > The last 2 rebuild kit I got, do not have the
> > > > > > diaphragm in them.
> > > > > >
> > > > > > TIA
> > > > > >
> > > > > > Martin>
> > > > > _______________________________________________
> > > > > > Diy_efi mailing list
> > > > > > Diy_efi at diy-efi.org
> > > > > >
> > > > http://lists.diy-efi.org/mailman/listinfo/diy_efi
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > __________________________________
> > > > > Yahoo! FareChase: Search multiple travel sites in
> > > > one click.
> > > > > http://farechase.yahoo.com
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > __________________________________
> > > Start your day with Yahoo! - Make it your home page!
> > > http://www.yahoo.com/r/hs
> >
>
>
>
> ------------------------------
>
> Message: 6
> Date: Fri, 11 Nov 2005 20:53:23 -0800 (PST)
> From: Tim Marsteiner <tmarstei at yahoo.com>
> Subject: [Diy_efi] Iridium plug problems
> To: diy_efi at diy-efi.org
> Message-ID: <20051112045324.79910.qmail at web30209.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Trying to debug an intermittent problem with one of my
> motorcycles. It's a big V-Twin using an alpha-N efi
> system with COP.
>
> Every so often perhaps once a month it bogs down bad
> and starts to backfire severely. As soon as I pull the
> clutch in it stalls and won't restart. This typically
> happens 5-10 minutes after startup. The problem has
> always "fixed itself" after letting the bike sit for
> 15-20 minutes. So it appears that heat soak is
> "fixing" the problem.
>
> I am running an open loop tune and my data logs
> indicate TPS, IAT and engine temp sensors are fine.
>
> I do notice my CHT temp gauge starts going up on cyl
> #1 perhaps 20-30 F. Of course it does not run very
> long in this condition. Also, on a recent ride, just
> as the problem began, one of my riding buddies
> reported flames coming out of the front cylinder's
> pipe. Nice. I replaced the front cylinder's COP and
> man I thought that was it ... it had made it over 2
> months without a problem until yesterday.
>
> Since heat soak seems to fix it I am guessing it is
> not some kind of harness short. Plus no DTC(s).
>
> Last spring I changed to iridium plugs. It never
> happened before this, but it ran fine for several
> months with these plugs before the problem started.
>
> A while back there was a discussion on platinum plugs.
> Can iridium plugs also put more stress on ignition
> components? And does this apply to a coil on plug
> system?
>
> And now the $400 question. If they do put more stress
> on the system could it cause the coil to draw
> excessive current from the ECU's coil drivers?
>
> Thanks,
> Tim
>
>
>
>
> __________________________________
> Yahoo! FareChase: Search multiple travel sites in one click.
> http://farechase.yahoo.com
>
>
> ------------------------------
>
> Message: 7
> Date: Sat, 12 Nov 2005 08:56:32 -0800 (PST)
> From: Tim Marsteiner <tmarstei at yahoo.com>
> Subject: RE: [Diy_efi] Iridium plug problems
> To: Rod Hiorns <R.E.Hiorns at IEE.org>, diy_efi at diy-efi.org
> Message-ID: <20051112165632.3005.qmail at web30207.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> These are the plugs pulled this morning:
>
> http://www.superxtune.com/images/plugs.JPG
>
> I am running LOP (tuned about 16.0:1) at cruise engine
> loads and data logs of narrow band O2 sensor show
> 0.000 volts right before the problem starts.
>
> Hmmm ... how about this scenario, fuel pressure drops
> drastically, mixture is too lean to fire consistently,
> some unburned mixture left in exhaust and/or chamber
> finally does ignite causing severe backfiring and
> possibly some light detonation.
>
> Fuel pump/pressure regulator is inside tank but sits
> inches above the front cylinder head... definitely
> could be affected by heat soak.
>
>
> Tim
>
>
> --- Rod Hiorns <R.E.Hiorns at IEE.org> wrote:
>
> > It's the cylinder pressure, the spark gap, and the
> > sharpness of the
> > electrodes that determine the strike voltage, and
> > it's higher voltages
> > that punch through the insulation of the coils (and
> > leads where applicable)
> > sooner than lower ones. Unless you've opened your
> > gap, or rounded your
> > electrode I think your iridiums will put *less*
> > stress on your COPS.
> >
> > I'd suggest you have mixture issues which could be
> > fouling the plug as
> > you go through warm-up. What pressure's the rail and
> > is it supplying
> > evenly?
> >
> > HTH
> > Rod
>
>
>
>
> __________________________________
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>
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