ZJ 5.2 1996 No start (tach not moving)
Hey all!
I have a 1996 Jeep Grand Cherokee 5.2 v8. About two years, it completely died on me while driving (was idling at a traffic light, then it stalled). Since then, I haven’t managed to get it started. The engine turns over, but the tach is not moving. I initially thought it was the CPS, but I’ve now replaced it with 3 different ones (am in Europe, so hard to find original parts). At this point, I’m inclined to rule out the CPS itself (even if I still don’t have a mopar). I’ve also tried to wire battery negative directly to the blue/black wire for the CPS to rule out bad ground (makes no difference). I’ve also replaced the PCM, which made no difference.
Other things I’ve checked:
* Fuses
* Relays (swapped the horn relay with the ASD)
* The fuel pump runs for a few seconds (I can hear it, and I can smell the gasoline)
* Tried start spray
At this point, I’m running out of ideas. I’ve tried to measure the signal and reference wires (black/white and orange or red) but I’m not really sure which is which. At least one of them gives constant 5v. Other things I’m thinking:
* Other sensors (MAP, TPS etc) shorting the circuit?
* Camshaft position sensor?
Any help on this would be greatly appreciated! I’m getting quite frustrated with this car.