Question about 1997 Jeep Grand Cherokee

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Stalling show a pitchure of pcm board

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Check your air idle control valve that is the most common problem on jeeps it's behind the throttle body.

Posted on Dec 12, 2012


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sounds like your PCM is going, Dodges are known for this, most of the time the circuit board inside cracks, and when cold will run, when warms up it dies due to the crack gets bigger due to heat but first check to make sure your grounds for your PCM are good, and bad ground can cause a No Bus to.

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We have no such diagrams as they are part of the factory service manual. You can buy access to the manulas for the car here.

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I wouldn't think sensor problem. Need to monitor data to see what is not showing up. Some input to the PCM is not being seen. You need to monitor sensor data to see what disappears, it will lead you to the problem.

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1989 Z24, 2.8v6 intermittent stalling while driving. Sometimes will restart, but not go far, sometimes will not restart at all. Usually starts fine the next day, may run OK several days before acting up...

the pcm may have a cracked board, i had an 88 cavalier z24 with the same problem, replced the ecu and it ran fine, the problem is that the boards inside the pcm crack and lose connection, the next time it acts up open the glove box and try tapping on the pcm, if the car responds at all, the pcm is bad

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