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1996 vs 1997 ECU

Dedicated forum for all things electrical... Sometimes Electrical issues can really get you stumped! Not Stroker related.
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Posts: 1
Joined: June 14th, 2021, 7:17 am
Stroker Displacement: 4.7
Vehicle Year: 1991
Vehicle Make: Jeep
Vehicle Model: Comanche

1996 vs 1997 ECU

Post by torq_shep » June 17th, 2021, 3:30 pm

I am going to convert my 1991 Comanche to OBD2. I already have a 1996 cherokee engine and dash harness but I do not currently have an ECU. Can I use a 1997-1999 (pre coil pack) ECU or do I need to use a 1996 ECU to have everything work correctly? I heard that maybe the 1991-1996 tach does not work with the 1997-1999 ECUs? If true is there an easy modification to make it work?

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