I know this isn't a Jeep forum, but these engines are so similar that I think the right answer will apply.
OK, I'm at my wit's end with this damn '96 Jeep Grand Cherokee that I sold to my brother. We finally traced the no-start problem to a bad CKS and replaced it. Got the truck running and it idles fine, but now it has an intermittent misfire at RPM that is getting worse. Yesterday, it threw a code. Put the reader on and it says the code is "intermittent signal from CKS or CPS." Since we had a known good CPS laying around we swapped it out. Still runs like crap. Put in a new cap and rotor just for grins and giggles. No improvement.
My understanding of the CPS and CKS is they either work or they don't, no in between. Is it possible we got a defective CKS that would allow the engine to start, but be misreading the reluctor ring and causing a misfire or intermittent signal that results in poor performance? This vehicle was running perfect before this all started and it got a new cat and 02 sensors 2 years ago (less than 8k miles since then). It isn't throwing any codes other than the one previously mentioned. We did not reset the PCM, although it was disconnected for a day while we were troubleshooting things. Would resetting it into adaptive mode help since we've replaced some sensors? HELP!
OK, I'm at my wit's end with this damn '96 Jeep Grand Cherokee that I sold to my brother. We finally traced the no-start problem to a bad CKS and replaced it. Got the truck running and it idles fine, but now it has an intermittent misfire at RPM that is getting worse. Yesterday, it threw a code. Put the reader on and it says the code is "intermittent signal from CKS or CPS." Since we had a known good CPS laying around we swapped it out. Still runs like crap. Put in a new cap and rotor just for grins and giggles. No improvement.
My understanding of the CPS and CKS is they either work or they don't, no in between. Is it possible we got a defective CKS that would allow the engine to start, but be misreading the reluctor ring and causing a misfire or intermittent signal that results in poor performance? This vehicle was running perfect before this all started and it got a new cat and 02 sensors 2 years ago (less than 8k miles since then). It isn't throwing any codes other than the one previously mentioned. We did not reset the PCM, although it was disconnected for a day while we were troubleshooting things. Would resetting it into adaptive mode help since we've replaced some sensors? HELP!