Question about 1997 Jeep Grand Cherokee

2 Answers

Jeep starts and runs for awhile then shuts off

Originally bought the jeep knowing it needed a crank sensor, replaced that and my friend cleared all the codes, jeep ran great, then shut off again, no codes, I checked the cam sensor and it was cracked in half so I replaced that also, it has a new coil, plugs , cap, someone also changed one of the 3 conn. going into the ecm, probably thought they found the problem, when I move any of the 3 conn. going into the ecm, the jeep will shut off, my jeep is california emmissions, was wondering if you think my ecm is bad and can I replace it with a federal emmissions ecm thanks mike it is a 97 grand cheerokee limited

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  • chevelle725 May 25, 2009

    thanks for your advise, will drop it off and have it checked thanks again

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Hey Mike, it sounds like a problem with the ECM or a wire going to it, if the wires sheath does not look damaged I'd say that it's probably dry joints in the ECU. If you were to take the ECU to an electronic service shop it will likely be a lot cheaper than getting a new unit. I'm not sure what you mean by the federal emmissions ecm i'm in Australia, we don't have those.

Posted on May 25, 2009

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If moving the harness at the ecm causes a shutdown, likely either a pin is bent or there is corrosion on a pin or socket. either way there is a poor connection there that you need to identify. I have seen people clean up the connector end of a pin but fail to check where the wire goes into the backside of the pin...make sure you do that.
Change it? well if you find a compatible unit and have checked everything going in and still have a problem, I don't see a reason not to do so!!!
Good Luck!!

Posted on May 25, 2009

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