[Gmecm] Acquiring ECM schematic

[davesnothereman at netscape.net]

Yeah, the concern over liability is everywhere in GM land.  I called GM 
customer service line looking for specs for a cam once, a cam sold for 
"offroad use only", and when I mentioned that I was going to use it in 
an offroad engine in a modified vehicle (racecar) the person at the 
other end wouldn't talk to me any more.  I had to call back and I made 
sure to only answer questions I was asked. :)

-----Original Message-----
From: William Lucke <william.lucke at highspeedlink.net>
To: gmecm at diy-efi.org
Sent: Fri, 09 Jun 2006 13:19:45 -0400
Subject: RE: [Gmecm] Acquiring ECM schematic

   The secretive environment may stem in part from EPA regulations. I 
mentioned DIY ECM programming to Allen Cline once and he commented that 
GM had no licensed anyone to do anything with the code and said that 
providing me with an uncertified program for the Cadillac Northstar 
could cost him his job, because it would amount to a violation of EPA 
regulations regarding MFG's putting out non-emissions compliant 
info/parts.

  Heaven forbid that 0.0000000002% of cars on the road have tweaked 
ECM's... Typical government bullshit.


 Will

 > From: Ryan Hess <rgmecm at yahoo.com>
 > 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
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