Re: What model ECM is this ?

[Mark Romans <romans@pacbell.net>]

I think the 90 and earlier ecm's are P4, and 91 and later P5.  I know didly
about processors though.
Mark
-----Original Message-----
From: Team ZR1 <teamzr1@teamzr1.com>
To: gmecm@efi332.eng.ohio-state.edu <gmecm@efi332.eng.ohio-state.edu>
Date: Sunday, January 16, 2000 1:21 PM
Subject: Re: What model ECM is this ?


>Mark, I have tried compares with ZR-1 E-proms of 91,92,94 and 95.
>
>I think that since the ECM changed for '91 that I could be limited in what
to
>compare to
>
>I think the older ECM for the Corvette were 8 bit and it was in 94 that a
16
>bit was used for OBDII needs
>Correct ?
>Which processor did they use ?
>
>John
>
>Mark Romans wrote:
>
>> John:  What year prom are you  comparing yours too?  If the ecm is a 90,
>> compare it to that.  I have seen differences like this when the code is
>> offset just a few bytes, when in reality those few bytes are the only
>> difference.
>> Mark
>