Question about 1998 Jeep Grand Cherokee

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Engine shuts down, will crank but not start.

I have a 1998 Grand Cherokee 4.0 4x4 with 144000 miles. The jeep runs perfect until suddenly at any speed the engine shuts down completely and must coast to a stop, after a little while I am able to restart. Would this be a faulty ECM and if so would it be possible to reprogram/fix it? Thanks...ron

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You need a crank shaft position sensor, located in the bell housing of the transmission. This is an extremely common problem on these.

Posted on Apr 13, 2009

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Same problem. Tried replacing crank sensor, coil and battery because I took advice from a forum. No difference. Finally broke down and started going through everything with a multimeter. All signs pointed to a faulty PCM. I wiggled the wiring harnesses and could kill the motor at will. to be sure it wasn't just the wiring, I held the harnesses and could not kill the motor by moving only the wires. The harnesses are in great shape. It is the soldered joints in the PCM that have intermittent broken contact due to years of vibration and thermal expansion and contraction. Autozone has the cheapest pre-flashed PCM's that I could find at about $300 plus tax. Hope this helps!

Posted on Apr 22, 2009

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1 Answer

My 1998 Jeep grand Cherokee it would not start crank but will not start


which engine? we cant guess here. not ever.
please edit your post.
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On some applications you might also have to hold the "Set" button down.

If you have an overhead console computer try this;

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