Re: What model ECM is this ?

[Shannen Durphey <shannen@grolen.com>]

Team ZR1 wrote:
> 
> Bruce, thanks for the reply ..
> 
> Yes the ECM for the C4 Corvettes is in the engine bay.
>From 90 on up.

> I cannot use my Diacom Plus because this is a pure race designed ZR-1
> and because of that G.M engineering removed the other processor (CCM)
What does CCM stand for?

 and
> all smog functions, etc. Thus no communcations via DLC connector, maybe a Tech I
Then there is no DLC in the car?  If not, a Tech 1 cannot communicate
with it either.  If there is one, then it's possible the code is
removed to support it.  I'm also wondering if the DLC's just not wired
in.  You mentioned having some stock ZR1 calibrations, are they
something that you've tried to use in that ecm?

Is your car the same one that was stolen by some young kids and then
run out of gas during the ensuing chase?  That one made some of the
car mags.
Shannen

> 
> but not sure on that.
> Since the only part of the car that is stock is the frame and rear end, its hard
> to tell where all the
> parts like the ECM began life.

> 
> John
> 
> Bruce Plecan wrote:
> 
> > Is there a series of numbers like 1228331, on a white paper tag on the
> > outside?.
> > Is this a water resistant ecm, as in mounted under the hood?.
> > Barring another opinion, I'd use the 1227730 info as a guide for what you
> > have...
> > The only way I know to actually absolutely verify what you think is going on
> > is to burn a chip, and try it with diacom+ running, or build a ecm bench.
> > Short cut to burning prom is a eprom emulator, but $$.
> > Grumpy
> >
> > | The ECM in my Snakeskinner ZR-1 Corvette has these numbers on the PCB
> > towards
> > | the end where E-prom sits.
> > | By barcode : 309023101908316
> > | Corner of PCB is : IE315 P-5
> > | More towards center : 61C315 P-8 ( I think its an 8 )
> > | So which model is it, what processor does it use ?
> > | Also I downloaded this disassembler off of the TunerCat website and I can
> > not
> > | tell if its disassembling correctly.
> > | Which proocessor do I choose and is there any thing I have to change in
> > the
> > | setup screen ?
> > | Can I tell if the output code is correct ?
> > | Thanks,
> > |              John Rovner