Question about 1998 Jeep Grand Cherokee

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1998 jeep grand cherokee keeps stalling ... when sitting a light or low idle will stall ... will run good for week at a time and just stall while driving ... have replaced fuel pump and crank sensor

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Similar problem with mine. disconnect battery for 45 min and better=
reconnect battery 1 hr later better/causes car computer to reset

Posted on Sep 13, 2010

  • skater_bo465 Jul 15, 2011

    if that doesn't work try checking your idle air control valve, the throttle position sensor,the manifold absolute pressure sensor,if those are fine check for vacuum leaks if that doesn't resolve the problem the only other thing i could think of right now would b to check your throttle body seal

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If you keeping the car get ignition modal, ecm on line for $200 keep the core,distributor if any[
-cps connector bypass 3 wire to 3 wire, this may fix your problem today but next month you need coil,or another bad conection.... but you will be prepared get all ignition parts and appropriate tools in one box and keep it in trunk stay safe out there

Posted on Mar 31, 2014

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Posted on Jan 02, 2017

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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 (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) 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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This happened to me recently on my 2004 Grand Cherokee. It stalled out three times in a month. No one came up with any codes except that my throttle sensor needed to be replaced ($80). After it was replaced, it stalled two more times, but this time the check engine light never came back on. My local Jeep mechanic looked it over for around six hours and could not find anything. However, my amps on my battery was half of what it should be. He stated that the computer may not have enough juice to control the throttle idle that activates when the vehicle is in low idle speeds. He also stated that once you remove the old battery to touch the battery cable terminals together (you can use a wrench if terminals won't touch) for around ten seconds. This is supposed to drain any remaning juice from the jeep and is supposed to reset the idle memory and computer for the vehicle. After replacing the battery, crank the Jeep up and let it run for at least five minutes without ever touching the gas pedal. Leave it to idle and I repeat, do not touch the gas during this time. The mechanic stated that letting the vehicle run for at least five minutes without touching the gas pedal will set the computer for the Jeep to run efficiently with the new battery and will also set the idle memory for the jeep. I did so and you could actually see the RPM's going up and down until the Jeep found an efficient idle setting. Try that, I know it sounds simple, but I tried every else before this, and it has not stalled out since a couple of weeks ago. I'll write back if it does before the end of next month. Hope this helps.

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