how many of you had pcms go bad
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by pcms you mean the computer, well my friend has had 2 change of cmputers on his ZJ.. and normaly the simtoms were, it try to shot down while crusing or it did shot down, all lighst start poping like crazy,, IDK what else..
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Usually they die and the engines will not restart. The PCM or ECU will not have the correct voltages at the pins or no voltage at all. HTH wicked.
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Year: 94
Model: Cherokee
Engine: 4.0L
Had to replace the PCM in the wife's 5.2L Limited. As the weather turned colder it would take longer for the computer to warm up (something internal) which would trip the fuel pump relay and pressurize the fuel rail allowing it to start. This is not uncommon i hear.
Reman unit from ebay fixed it right up.
Reman unit from ebay fixed it right up.
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Most of the XJs that have a 4.0L have great ECUs and they last forever as long as they don't get wet. The ZJs had a different less reliable ECUs and they crapped out early.
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Year: 1990
Model: Cherokee
Engine: 4.0 I 6
frankz i put in a new cps tested that a whole coil pack from a running jeep and still no spark any were wtfffffff!!!!!!! i wanna bring my xj sunday to October truck fest at k4wd
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Year: 1990
Model: Cherokee
Engine: 4.0 I 6
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