Re: spark data on 1993 TBI 5.7 engine

[Shannen Durphey <shannen@grolen.com>]

Aren't you running a 7747 in that truck?  That's not the original ecm
for the Caprice.
 AXBF/9687 is correct for the Caprice.  

I don't believe there will be any spark data fo either ECM of that
vintage.

For a 7747 in 91, you might look for an ARJT/7489 or an AKWA/1135. 
The ARJT looks like it's close to a  "universal" calibration, it fits
9 different vehicles.
Shannen
steve ravet wrote:
> 
> I have the same engine in my S-10, only 1991 model.  I use an MPSI
> scanner and never noticed any spark data, figured this "old" C3 didn't
> output it.  I mostly use the scanner while driving (open mode), I don't
> know if the other modes (ground, diagnostic) have spark info or not.
> 
> Al's got me curious, though, about a superceded PROM for my
> application.  I don't know what my current BCC is, can someone tell me
> what the latest one is?  It's a 1991 Caprice cop car 5.7L TBI V8.  Is
> that enough info to look it up?  Jason, do you have any information
> about the PROM contents?
> 
> --steve
> 
> > "Jason R. Haines" wrote:
> >
> >
> > I am trying to figure out why a Tech 1 and a Tech 2 don't show spark
> > data for a 1993 Caprice with the 5.7L VIN 7 engine (5.7L TBI engine).
> > The chip broadcast code is AYDN (checksum 793E) and the ECM part
> > number is 16136965. The data in the chip looks a LOT like a 1985 TBI
> > V8 engine. The chip type is 27C32B.
> >
> > Any ideas why I am not seeing spark data? Any way to see and log spark
> > versus rpm data?
> >
> > Regards,
> >
> > Jason
> >
> 
> --
> Steve Ravet
> steve.ravet@arm.com
> ARM,Inc.
> www.arm.com
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