Jeep Cherokee Sport - Stalling - JeepForum.com
 
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post #1 of 2 Old 07-01-2020, 05:32 PM Thread Starter
Fujifilm
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2000 XJ Cherokee 
 
Join Date: Oct 2012
Location: Columbia
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Angry Jeep Cherokee Sport - Stalling

2000 Jeep Cherokee Sport - 4.0 with 152K miles. Two weeks ago I replaced the radiator (due to a crack), the thermostat, oil pressure switch and the coolant temperature sensor. (I figured it was time to change them all as I was doing the radiator work). Everything seems fine on that front. However, this past Sunday I was driving after the car had sat for an hour and it stalled at a stop sign. I placed it in park and it fired right back up. I then drove to get some gas, (where I turned the car off and back on) and drove back home without incident. Later in the afternoon, I drove for about 10 miles, sat for 1/2 hour and started it back up only to have it stall as soon as I pressed the gas. I let it sit for a minute and then it restarted. Yesterday I drove it for 3 miles to the store, where I shopped for about 20 minutes. It started right up, but I drove 300 yards to the stop sign where it stalled again. This time it took a little longer to start. I had to sit for a few minutes, but eventually it turned over and I was able to make it home. It's not running rough and all the gauges seem to be ok. No fault codes have been recorded. Tonight I started it up and let it get to running temperature before I drove for about 10 minutes. After I turned it off, I attempted to restart it, which it did immediately.

I'm struggling to see what the problem is. I cleaned the battery terminals and ground connections. I wiggled the plugs to the ECM as it was running and everything seemed fine. I also looked for any electrical shorts but did not find any. I was thinking it could be the crankshaft position sensor, but I'm not 100% sure. The mileage tells me it might be time for a new one.

Anyone have any thoughts? Much appreciated.

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post #2 of 2 Old 07-02-2020, 09:07 AM
azhang253
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2000 XJ Cherokee 
 
Join Date: Sep 2016
Posts: 31
Quote:
Originally Posted by Fujifilm View Post
2000 Jeep Cherokee Sport - 4.0 with 152K miles. Two weeks ago I replaced the radiator (due to a crack), the thermostat, oil pressure switch and the coolant temperature sensor. (I figured it was time to change them all as I was doing the radiator work). Everything seems fine on that front. However, this past Sunday I was driving after the car had sat for an hour and it stalled at a stop sign. I placed it in park and it fired right back up. I then drove to get some gas, (where I turned the car off and back on) and drove back home without incident. Later in the afternoon, I drove for about 10 miles, sat for 1/2 hour and started it back up only to have it stall as soon as I pressed the gas. I let it sit for a minute and then it restarted. Yesterday I drove it for 3 miles to the store, where I shopped for about 20 minutes. It started right up, but I drove 300 yards to the stop sign where it stalled again. This time it took a little longer to start. I had to sit for a few minutes, but eventually it turned over and I was able to make it home. It's not running rough and all the gauges seem to be ok. No fault codes have been recorded. Tonight I started it up and let it get to running temperature before I drove for about 10 minutes. After I turned it off, I attempted to restart it, which it did immediately.

I'm struggling to see what the problem is. I cleaned the battery terminals and ground connections. I wiggled the plugs to the ECM as it was running and everything seemed fine. I also looked for any electrical shorts but did not find any. I was thinking it could be the crankshaft position sensor, but I'm not 100% sure. The mileage tells me it might be time for a new one.

Anyone have any thoughts? Much appreciated.
Hey, I think this belongs in the Cherokee specific forum, but I'll leave it mods to move it.

I had a similar (albeit less severe) version of this problem, and while I'm not sure I got it's fixed, I was at least able make some improvements (you can see my thread in the XJ Cherokee forum).

First Question: Did you overheat? The stock 0331 heads that came in the 2000 and 2001 cherokee's had a cracking problem.
Second Question: Check your O2 sensors! Both upstream and downstream sensors are used to air/fuel, so it's worth it to take a look. It really helps to have a scanner than can monitor live O2 Voltages, coolant temp, manifold pressure, fuel trims, ect.

Good luck!
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