4.0 Crankshaft Position Sensor Replacement

[dxrflyboy]

Has anyone tried unbolting the driver's side engine mount and lowering the engine for better access?

[kj5vc]

The CPS was faulty on our 1996 Jeep Grand Cherokee causing severe missing for a long time and finally ocassional stalling. The missing was most severe and the OBD diagnostic tool only pointed up cylinder misfires. However the lightbulb went on in my head when I associated another OBD failure; fuel trim = -100%. This indicated the computer was shutting off the gas due to lack of CPS pulse. Installation of an aftermarket CPS solved all issues.

I had dealers in Rio Rancho, NM state that they had seen the problem before on 4.0 Jeep and couldn't fix it . . . hmmm.

[kj5vc]

BTW the new CPS also fixed the rough idle in the AM. No longer need warm up jeep for 10 minutes in cold weather.