I have a 95 JGC 4.0 2 wheel drive. I have the infamous shut off problem but I have....changed the plugs, cap, & rotor and added a ground strap from block to firewall, put (2) CPS sensors, TPS, and still no improvement. I am at my wits end and short on money to figure this out. Now I am trying to decide where best to spend my money. I can have my computer rebuilt or spend the money at the shop to diagnose the problem. I can't afford to have them diagnose and fix it, so I'm not sure whether I should spend it on the computer. Is there an ignition module that might be going out? I had a 92 van that kept shutting off and it was the ignition module. Someone please HELP. Thanks
It does it when it warms up. I did manage to get a CPS code once and PCM code another time. I have replaced the CPS twice since then but not the PCM. It does it while driving and just shuts down. Just before dying the tach guage goes crazy and after it dies it keeps going wild for about a good 30 seconds or longer. Does this sound like the PCM? Thanks
Oh Ok. My jeep doesn't have the vic. I wish it did because I see what you mean by the voltage issue. The stock stereo was also removed and replaced with a different one that doesnt work so I cant use that as a guide either. Any other ideas? Thank a bunch!
I replaced the battery with a brand new one and cleaned the terminals real good when I put it back in....but....I have not checked from battery to block(neg-) or (pos+) to starter though. I will be sure to check those in the morning. I did add a ground from the block to the firewall.
I had the same symptoms (shutting down) and was leaning towards the PCM. Replaced the Crank sensor with an aftermarket one n cured for a short time then back to the same. Checked all the connections and cleaned what I could. Did notice that I could shut it down while running if I wiggled the connection between the Crank sensor and PCM. Broke down n bought a factory Crank sensor from the dealer and all is well again, a perfect fit. Apparently from I've been reading in JF, these GC's are very picky about relays, sensors and such. Only wants Mopar stuff, oh well. Not sure if you said you used dealer or aftermarket sensors, but just a thought. Good luck n let us know if your rebuilt PCM works.
93 Laredo 4.0
96 Limited 4.0
[QUOTE=murphydajeep;9487478]I say you should still hit something just to let it know you mean business, or shake a hammer at it in a menacing fashion[/QUOTE]
Thanks for the advice. Both CPS's were aftermarket unfortuneately. If after getting the PCM back with no improvement, I will buy a dealer CPS. I have heard the same thing you are saying about the dealer part vs. aftermarket. Also, my PCM was shipped to a company in Davie Florida...hope they are good, heard great things about them. The gel on the board had tons of cracks in it, especially around ALL 3 resistors, so I am assuming water had gotten in and shorted one or more out.