whole jeep vibrates when under load
I just got a 4.0 95 ZJ, it starts great but when shifting out of park or neutral the jeep would vibrate like crazy. It would run and settle down just fine until I'd come to a stop sign or light then, while braking, the vibration would begin again and sometimes cut out or stall.
Checked drivetrain, exhaust, mounts and the codes. No check engine light. Watched a youtube that sort of described my problem and the fix was to replace the throttle position sensor (TPS) while being careful not to mess with the throttle body by cleaning it or moving the throttle. (sometimes that causes the PCM to mess up the learned idle apparently resulting in an abnormally high idle situation.
I did as the video instructed and picked up a new TPS at Advanced Auto for around $40. Put it on (simple 2 torx bolts) and the jeep ran just fine. No more vibration or stall. Happy as a clam here although at some time in the future I plan to clean the throttle body, etc. Hope this might help someone since I had a hard time figuring this out and I have the service manual which wasn't much help in that regard.