What model ECM is this ?

[Shannen Durphey]

Ahh.  Maybe it's set up like the Australian 808.  First, how many
wires in the DLC, and what colors are they?  Second, have you tried
getting trouble codes by grounding a + b in the DLC?  Third, it's hard
to imagine a race team not caring about engine data.  Maybe they had
an alternate way to see what's happening?
Shannen

Team ZR1 wrote:
> 
> Hi Mark,
>               The Snakeskinner was designed from the ground up to be a
> professional racecar and thus only a few parts came from stock OEM parts. To
> reduce the weight by almost 1,000 lbs about everything you can think of is not
> on this car including to what I have been told for the ECM to give full
> communcations the CCM has to be present which is not in this case.
> The car was designed in 1994 but I think all the logic is from a 1990 model year
> though I do not know if the ECM is from that year.
> There is only a red light for the "Check Engine" none of the other ECM or CCM
> functions are onboard.
> That red light just comes on and stays on. Being a pro racecar there is a master
> D/C switch and I assume all power to
> ECM is shut down when car is turned off, blowig out any error codes, thus red
> light does not come back on after a re-start.
> Somehow G.M rigged that light to ECM.
> If I can get those numbers decoded for which ECM it is would be helpful.
> I do know that the E-prom carrier does not have some type of logic piggybacking
> above the 2 smaller chips
> as I see on a stock one.
> I have tried both DLC connectors for the Diacom Plus and it will not link.
> 
> John