Hello everyone!!! I'm Gabriel from Buenos Aires (Argentina) and i have a jeep cherokee (1991) with RENIX ECM.

My Problem is:

- In (D),(3) and (1-2) shift position, the engine cut out at 1000-1200 RPM like a Rev Limiter

- In (R),(P) and (N) the engine runs OK!!! No cut out! No problems!


Checked sensors with multimeter and Oscilloscope:

- TPS ok!
- MAP ok!
- CKP ok!
- ECU & TCM Grounds OK!


I take out the TCM thinking about a TCM Malfunction but nothing change, same problem!


I don't know what can I do...

Thank you all!!!

Gabriel-

 

??? Goofy stuff often ends up being a ground issue, & that sounds goofy! Also a Renix ECU in a 91? That sounds goofy as well. Anyway here's Cruisers tips. Cleaning grounds is something to do anyway, so maybe start by giving that a shot.

>> https://www.cherokeeforum.com/f51/cru...x-tips-153657/

 

The engine may be loose from the transmission allowing the cPS to move away from the flywheel in forward torquing motion.