Brains?

[Jeepcom23]

I just picked a 97 ZJ for the engine to go in my MJ.

Can I just swap out the engines and use my MJ's brains and electronics or do I need to swap all the ZJ stuff into my MJ?

It's a 1997 4WD, Auto, 4.0.

 

Thanks!

-Cody

[Eagle]

Your 91 is OBD-1, the '97 is OBD-II. Not sure, but I think you have to swap over the electronics with the engine. Or use the sensors and such from your eld engine on the new one.

[Geonovast]

If you just swap the longblock, you should be fine. You're going to have to put your distributor into the 97 motor, however.

 

I put a 91 XJ 4.0 into a 98 XJ, and only had to swap the dizzy. Motor works beautifully.