Question about 1997 Jeep Grand Cherokee

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1997 Jeep Grand Cherokee Stalls when put in gear V8

No diagnostic code or check engine light. 738 rmp and 7.4"hg at idle, If gas peddle pressed and released RPM drops & engine may die while in neutral.

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Replace the throttle postioning sensor, and mass air flow sensor

Posted on Mar 09, 2009

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I don't think the PCM is your problem, is the check engine light on? It could be you idle air control motor this is located on the throttle body, but because this happens while driving I am thinking you will need to replace your crank shaft position sensor it is located on the transmissinon bell housing it is very hard to replace without the correct tools. If the check engine light is on take it to a local auto parts store and ask if they can check the check engine codes for you they usally will do this for free.

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2 Answers

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HI, It may seem obvious, but sometimes overlooked.... have you checked the oil level, as low oil can cause some strange things to happen! My 96 4 liter would be reluctant to move sometimes, but after I topped it up, it has been fine.

Apr 28, 2009 | 1996 Jeep Grand Cherokee

1 Answer

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Mine does the same thing when the oxygen senor goes out... About every 70k miles. doesn't always turn on check engine light

Jan 17, 2009 | 1997 Jeep Grand Cherokee

1 Answer

I have a 1995 Jeep Grand Cherokee with the 5.2l V8. It starts but doesn't idle. When put in gear it stalls out. I have replaced the fuel filter and put in and additive to clean the injectors and clean out...


TRY THIS PROCEDURE:
Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

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