OBD1 PCM for 1997 LT1?
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Joined: Oct 2004
Posts: 211
From: Champlain, NY
OBD1 PCM for 1997 LT1?
Been keeping my eyes open for 94/95 LT1 donor cars for drive-line swaps and was wondering what is involved in let's say using a 16188051 pcm to run a 96/97 LT1 drive-line.
Concerns: PCM connectors, sensors and automatic transmission functions etc?
Don't want to pass on a deal if a OBD2 LT1 car surfaces.
Thanks
Concerns: PCM connectors, sensors and automatic transmission functions etc?
Don't want to pass on a deal if a OBD2 LT1 car surfaces.
Thanks
Registered User
Joined: Dec 1969
Posts: 27,725
From: Little Rock, AR
Re: OBD1 PCM for 1997 LT1?
All you have to do is use a knock sensor that matches the PCM OBD type. Everything else connects up and works (naturally, anything specifically added by OBD-II won't).
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Joined: Oct 2004
Posts: 211
From: Champlain, NY
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Re: OBD1 PCM for 1997 LT1?
Read this, with regard to a possible issue with the resistance of the 3-2 downshift solenoid when using a 94/95 PCM with a 96/97 4L60E:
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Special thanks to Frank Cahall..... wish he would come visit us more often.
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'94 or '95 computer will not accept the 20-31 OHM 3-2 solenoid and will throw an SES light and throw the transmission into limp mode. Some less knowledgeable builders will swap the solenoid so the computer will see the correct resistance, but the valve itself then causes downshift issues. If only the solenoid is changed, it will result in a 3-2 downshift cut loose. In other words...3-neutral-2 downshift. Speedo moved to passenger side of tail housing, but easily changed.
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