Car Tech forum: 2000 Jeep Grand Cherokee - Stalls When Warm

I have a 2000 jeep GC 125000K. Last fall it started stalling on me while moving slow or fast, and while idle or stopped in park. As fall turned to winter the problem stopped but now that spring is here ONLY on warmer days 50 deg plus will it stall again, i replaced the crank shaft pos sensor. Oh, and when it does stall i pull over to the side try starting engine will crank but not start. and when I turn the key to the ON position none of the dash gauges move except for the battery gauge and that moves ever so slightly almost not noticeable. As I turn the key ON to OFF w/o trying the start, only when I turn it to the ON pos AND the guage work normally will it start. May take 30 seconds to 5 minutes of turning the key for the gauges to work. It must have something to do with over heating. I am fairly mech inclined, plus father is very capable but is also stumpped

Did you solve your problem? How? Need Help
My1999 V8 Jeep Grand Cherokee limited 4.7L V8 1J4GW68N7XC689389- stalls and stops mostly in heavy traffic condition. stop and go at slow speeds. Some times it stops also on cruising at 80 or 90 kmph. It happens about 3 to 4 times a day at slow speeds or cruising. what I have noticed as engine stalls and Check Gages light is on. Initially all gages looks ok. Within 2 or three seconds fuel gage shows Empty and security KEY sign is on. If you leave it these for 5 or 10 minutes and keep ignition on, if fuel gauge moves (showing not empty) it will start and you can drive off. If traffic is heavy it may stall again after a kilometer or so. If you can drive at about 80Kmph it goes for about 30 to 40 minutes and stall again. Twice I gave it to two different agency workshops and got the wiring checked and cleaned. On both occasions it worked without any stalling for 5 days and started to stall again. In both occasions there was no error code displayed when checked with computer. When stalling occurs and fuel gauge shows empty; the computer shows NO Communication with PCM.
Stalling problem is not there in winter on Highways. I can drive 500 to 600 km in one go. But as soon as it enters heavy city traffic it stalls with loss of power and fuel gage shows Empty along with other gauges.
I Got crank position sensor replaced at the workshop but problem persists. Also tried swapping of the ASD and fuel pump relay. Checked all cleaned all wiring harness. Still problem is existing for almost 2 years now. If Batteries are removed overnight, it generally behaves ok (Not Always) for 3 or 4 days and problem reappears.

Did you ever find the solution to this problem? I am having the same one... Replaced the Crank Shaft Position Sensor as well. It's driving me crazy!

I solved my problem finally by replacing the fuel filter. on the Grand the filer is also the fuel pressure regulator.

installed the PCU LAST night, took about 45 minutes.... so far so good.... we will see

We are having the same problem with our grand cherokee 2000. After spending $500 at the jeep dealership changing a receiver. Now they wants us to change the PCU which will cost approx $800. Can you tell me where did you find a used PCU and if did work for you changing it?
Thank you for your help.

Hi I see that everyone has the same problem with their jeep, but noone ever post the fix for it. Please help with any update my jeep is having the same problem I don't know what to do

Hi there,

PCU = Jeep's brain...the computer that runs all the electronic stuff. Also known as PCM...As for the unexpected stalling...We have replaced all modules, and sensors; just recently found out that this particular model jeep (Grand Cherokee) has a faulty wiring harness and that is very difficult to replace. If you can fine one - it's gonna run around 850.00$ Newer models (1998+) may still have parts out there for replacement. Even the Jeep dealerships have trouble finding or making harnesses for the older models.

Hope this info helps.

Have you had luck replacing the igniion coil and the stalling stops? We are having the same issue as the others, but can't afford to put $850 into a Jeep with 202,000 miles on it. Thank you for your help!

This happened to me I've been dealing with my 98 jeep Cherokee for the last six months and replaced everything on it map sensor as well as replacing all sensors on truck ignition coil, fuel pump exshust radiater, spark plugs PCM twice cavillitic converter , muffler, fixed wiring, did bolt twist new battery , everything ! Then got my transmission fluid flushed and replaced and since I did that it hasn't had one problem ! Just wanted to let everyone know that could possibly be the problem causing the tramission throttle not getting enough air if its clog or old fluid