going from a obd1 to a obd 2 pcm
Registered User
Joined: May 2006
Posts: 52
From: Round Rock, TX
Well, all said and done the OBD1 will produce more hp and the OBD2 will produce more torque. Not sure why this is, it just is. I dynoed back to back with the same numbers in each pcm. OBD2 was down about 7hp, but up about 10lb-ft of torque.
Also, unless you plan to run open loop you will need to add some additional sensors, namely a crank sensor and this will require a new front cover. I don't think that the 94s had a maf sensor, so if not you will need one. OBD2 uses a knock sensor and OBD1 doesn't. All of this will require a new or modified stock wiring harness to attach all these new sensors. It is much easier to go the other way--OBD2 to OBD1.
Probably not worth the trouble.
Also, unless you plan to run open loop you will need to add some additional sensors, namely a crank sensor and this will require a new front cover. I don't think that the 94s had a maf sensor, so if not you will need one. OBD2 uses a knock sensor and OBD1 doesn't. All of this will require a new or modified stock wiring harness to attach all these new sensors. It is much easier to go the other way--OBD2 to OBD1.
Probably not worth the trouble.
Registered User
Joined: Feb 2004
Posts: 1,154
From: VA
Registered User
Joined: Feb 2004
Posts: 1,154
From: VA
Also, unless you plan to run open loop you will need to add some additional sensors, namely a crank sensor and this will require a new front cover.
OBD2 uses a knock sensor and OBD1 doesn't.
All of this will require a new or modified stock wiring harness to attach all these new sensors.
It is much easier to go the other way--OBD2 to OBD1.
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Nayr
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Mar 3, 2023 08:34 PM