[Gmecm] Acquiring ECM schematic

Sun Jun 11 19:47:34 UTC 2006

Malcolm Robb has done a really nice job with hi-res pics of the 8331 ecm.
Can be found here:

http://www.lotus-carlton.fsnet.co.uk/topcard.htm
http://www.lotus-carlton.fsnet.co.uk/iocard.htm
http://www.lotus-carlton.fsnet.co.uk/ecu.htm

All of the chips are labeled with part number, but it takes some
cross-referencing to figure out exactly what they are functionally.

Todd
> -----Original Message-----
> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
> Behalf Of Tyler Townsley
> Sent: Saturday, June 10, 2006 7:59 PM
> To: gmecm at diy-efi.org
> Subject: Re: [Gmecm] Acquiring ECM schematic
> 
> You can still get a rebuilt zr1 ecm with your core(all years have been
> superceeded with one number, just use your year specific eprom). So
> someone out there has the spects as it not GM doing the work. There is a
> complete hac for the 90-91 calibration. A 90 zr1 is a steal right now.
> Parts and info is avaiable on the zr1 net and corvette forums.
> 
> Tyler
> 
> Ryan Hess wrote:
> 
> >Lets try this again...  my first message bounced from the mail server.
> >
> >I may have acquired an 8331.  Anybody wanna see what's inside?  :D
> >Anybody want anything specific done?  I was thinking about taking high
> res
> >pics, and putting them up on the DIY-EFI ftp or something.  Don't know
> >how, but I don't have it yet...  I'm trying to get the wiring diagram
> >as well.
> >
> >in re: the OBDII...  All we really need is someone to leak the source
> >code for one.
> >
> >Ryan
> >
> >davesnot
> >
> >
> >davesnothereman at netscape.net wrote: AFAIK The 8331 guys have to stick
> together.  When Chevrolet announced
> >no more parts for the ZR1 everything suddenly disappeared.  I suppose
> >the guys who can afford that car can also afford the parts?  It must be
> >really tough if you're not a resident of the US.
> >
> >I have to think the wise answer is to move on to the next generation of
> >engine control hardware, at least for us.  The later pcm's have more of
> >everything... but we really aren't using them.  Why?  Same old story.
> >Not enough info about the code, not enough tools to work with them.
> >
> >It's really, really too bad that GM / Delco / Delphi never saw fit to
> >release a reasonably priced aftermarket ecm.  Even an "offroad only"
> >limited function code for a specific OBDII pcm would have been nice.
> >
> >Zaphod
> >
> >-----Original Message-----
> >From: Ryan Hess
> >To: gmecm at diy-efi.org
> >Sent: Thu, 8 Jun 2006 13:25:19 -0700 (PDT)
> >Subject: RE: [Gmecm] Acquiring ECM schematic
> >
> >   Wow, I did not know that.  I can't imagine going through a 4 layer
> >board, and
> >worse, trying to figure out what IC does what.
> >
> >Who would you suggest I request information from?  Delphi?  Who built
> >their
> >early 90's OBDI ECM's?
> >
> >As sort of an aside, GM stopped making/supporting the 1228331 ECM found
> >on ZR1
> >vettes and the turbo lotus.  There was another part # that superceeded
> >it, but I
> >believe it too had been discontinued.  What are those people to do?
> >They don't
> >exist in junkyards (I've looked), and there's *one* on ebay for nearly
> >$600.  If
> >GM doesn't release the schematic for it, wouldn't they be out of luck?
> >
> >This secretive environment is just terrible.  These things are
> >approaching 15-20
> >years old now.
> >
> >
> >
> >davesnothereman at netscape.net wrote: Ryan Hess  wrote:
> >
> >
> >
> >>Question: how have ECM schematics been acquired in the past? ???the
> >>7730/49 on ludis' site, etc?
> >>
> >>
> >Old fashioned reverse engineering.
> >
> >
> >
> >>I'm in contact with an ECM remanufacturer, who
> >>presumably has a great deal of knowledge locked away somewhere. ???The
> >>question is, how do I coerce it out of them? ???
> >>
> >>
> >
> >Maybe you should request information as an ecm remanufacturer?  There
> >are a few
> >rebuilders, they must have obtained information in some way.
> >I'm specifically looking
> >
> >
> >>for a schematic of a '2240.
> >>
> >>
> >>I have to assume this is like the TV repair business, where the mfr
> >>charges a fee for access to their schematics..
> >>
> >>
> >
> >They may not release schematics at all.  GM is a provider of rebuilt
> >ecm's.
> >They have no need to support the business of repairing and rebuilding
> >computers.
> >
> >I know that it's easier to pull a hen's teeth than obtain Delco service
> >information for audio products, even those which are 15 years old.  And
> >once you
> >get service info, finding parts is even tougher.
> >
> >Zaphod
> >
> >
> >
> >__________________________________________________________________
> >Switch to Netscape Internet Service.
> >As low as $9.95 a month -- Sign up today at
> >http://isp.netscape.com/register
> >
> >Netscape. Just the Net You Need.
> >
> >New! Netscape Toolbar for Internet Explorer
> >Search from anywhere on the Web and block those annoying pop-ups.
> >Download now at http://channels.netscape.com/ns/search/install.jsp
> >_______________________________________________
> >Gmecm mailing list
> >Gmecm at diy-efi.org
> >http://lists.diy-efi.org/mailman/listinfo/gmecm
> >
> >
> > __________________________________________________
> >Do You Yahoo!?
> >Tired of spam?  Yahoo! Mail has the best spam protection around
> >http://mail.yahoo.com
> >_______________________________________________
> >Gmecm mailing list
> >Gmecm at diy-efi.org
> >http://lists.diy-efi.org/mailman/listinfo/gmecm
> >
> >
> >___________________________________________________
> >Try the New Netscape Mail Today!
> >Virtually Spam-Free | More Storage | Import Your Contact List
> >http://mail.netscape.com
> >_______________________________________________
> >Gmecm mailing list
> >Gmecm at diy-efi.org
> >http://lists.diy-efi.org/mailman/listinfo/gmecm
> >
> >
> > __________________________________________________
> >Do You Yahoo!?
> >Tired of spam?  Yahoo! Mail has the best spam protection around
> >http://mail.yahoo.com
> >_______________________________________________
> >Gmecm mailing list
> >Gmecm at diy-efi.org
> >http://lists.diy-efi.org/mailman/listinfo/gmecm
> >
> >
> >
> >
> 
> 
> _______________________________________________
> Gmecm mailing list
> Gmecm at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/gmecm