Chevy ECMs

Ken Kelly kenkelly at lucent.com
Wed Feb 3 14:41:19 GMT 1999


Ernst,

I haven't disected a 96 unit, so I can't give you a direct
answer. They seem to be very similar in many respects. I
have my 95 apart, socketed the PCM, and I am building a
Flash prom editor for this beast. If someone with a 96 wants
to open his or hers we can compare notes.

		Ken

Ernst Denbroeder wrote:
> 
> Curious...
> 
> Is the 96 PCM a pre 96 with additional circuitry or is it a ground up
> redesign?
> 
>         Ernst.
> 
> > -----Original Message-----
> > From: Ken Kelly [SMTP:kenkelly at lucent.com]
> > Sent: Tuesday, February 02, 1999 9:02 AM
> > To:   diy_efi at efi332.eng.ohio-state.edu
> > Subject:      Re: Chevy ECMs
> >
> > Curtis,
> >       The 96 PCM is OBD-II compliant. It is much more sensative
> > to changes than the older units. It will set a lot of error
> > codes if you make engine changes. A 94-95 PCM (16188051)from
> > any LT1 will plug into your wiring harness and run the
> > engine. It will not have OBD-II and not use the aftercat O2
> > sensors. Be sure to change the Knock sensor in the engine to
> > match the original PCM application. Some people have had
> > success changing the Knock module in the PCM to the one from
> > the original PCM and not changing the KS.
> >
> >               Ken
> >
> > > Curtis Mittong wrote:
> > >
> > > I have a 96 Impala SS with an LT1.  I also have a bare LT1
> > > block that I plan to bore and stroke to 409.  I already
> > > know about all of the mechanical pitfalls I will hit, but
> > > wondered how much HP will the stock PCM handle with
> > > reprogramming and about #52 injectors?  Will I be able to
> > > do it?  If not, what PCM should I use?
> > >
> > > Curtis



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