89 4.0 (renix) controlled with a obd1 ecu. Help!
I swamped my 95 GC. So I had to replace the engine. I grabbed a 89 Cherokee engine before I knew the engines were different. Right now the engine Mis fires and Rpms are bouncing around. I've swapped everything to the 89 engine. All electronics. Exhaust. And valve cover. I'm wondering if even tho this is a renix engine, with everything swapped over will my obd1 be able to control this engine ok? I have read there are differences in the head but I understood it was mostly air flow things. I still hVe the rad from the old engine and when it warms up I would be able to swap that on the new 89 engine. And help or advise would be great!