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Unread 12-04-2007, 04:44 AM   #1
muzicman82
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2011 WK 
 
Join Date: Jan 2004
Location: Woodstown, NJ
Posts: 218
1996 Grand Cherokee - Stalling Out!

Ok, what does this sound like to you?

If you've followed my few posts around here, my ZJ has about 293,000 miles right now, but for the most part, runs terrific. I've got no complaints. It has the 5.2L V8.

Although, it has this strange problem stalling out from idle.. It'll do it for some weeks or so, then be fine for months, then come back.

When it does idle, it is around 500-750 RPM, which is about where it has always been.

It seems that most of the time it stalls out is after I apply a good amount of engine rev, to something like 1,500 RPM, then completely let go of the gas. The engine RPMs drop below 500 RPM, and sometimes it'll kick itself back up to idle, and other times it'll stall out. So, as you can expect, getting around parking lots can take some time. I can always start back up, but because it stalls out, battery voltage drops from 14.4V to 9-12V.

When this has happened in the past, I have found that simply cleaning my battery terminals helps. The battery, alternator, fuel filter, spark plugs are all new (within 6-12 months old). I don't even know if this is electrical power related or fuel/engine related... I also regularly use Lucas Fuel Injector Cleaner.

Any ideas?

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Unread 11-13-2013, 06:18 PM   #2
matdmoor87
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Join Date: Nov 2013
Posts: 1
1996 Jeep Grand Cherokee stalling

Check the idle air control valve sensor. If it is stalling only under sudden acceleration from a complete stop, check the wires in the wiring harness for breaks or burns. If you slightly move the wiring harness while the vehicle is running and the engine stalls completely out, this is a good indication that there is a bad connection in the wiring. It will be the white wire in the 1996 Jeep Grand Cherokee 5.2 V8 Limited. This wire controls the Throttle Position Sensor, Map Sensor, and various others. While the break in a wire can be anywhere throughout the harness, I have found that most breaks occur on the right side of the engine, close to the pcm, in the upper bend of the harness before crossing over the rear of the engine goin towards the drivers side of the vehicle.
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