BattlebornXJ
NAXJA Forum User
- Location
- NEVADA
Hello all,
I'm an old guy and have little experience with forums so go easy on me.
I have two nearly identical XJ's. A 2000 and a 2001. The 2000 is just fine, it's the 2001 that is giving me a migraine. I say this because I'm swapping known working parts between the two to eliminate possibilities. That being said, here's my problem...
It's hot here now in Nevada, 108 degree average afternoon high (my problem definitely occurs way more often when the weather is hot). My jeep will die at freeway speed if driven at 65mph+ for 10-20 minutes at this temperature. I pull over and turn off the key. It will re-start immediately, but will hesitate and stutter if I don't let it sit and cool for at least 5 minutes. After 5 minutes it will start and accelerate normally back to 65mph, but will die again in a mile or two. If let it cool (with the hood up) for 20 minutes, I will make it another 10-15 miles before it dies again. If I can get off the freeway and take surface streets, it will drive all day with no further issues. So as see it, driving constantly at freeway speed in the heat causes it to die. And letting it cool down definitely helps, so heat must figure into the problem somehow. But at the same time, driving on surface streets where the jeep runs at a higher temp and in a hotter environment, it will run fine. I have swapped out the following parts that I know are functioning properly from my other jeep: Crank position sensor, TPS, ignition relay. I tried the PCM but the 2001 has a skim key and it destroyed the PCM from the 2000 (or so i'm told). DON'T try a PCM swap unless you know what you're doing! The fuel pressure at the fuel rail is good, and fuel will squirt from the test port schrader if pressed immediately after the jeep dies. I've been beating my head against this rock for a few months now with no solution. Any suggestions would be greatly appreciated. Thanks
2001 XJ, 4.0 engine, 140k miles, AW4 transmission, NP 231 transfer case. 3.5" lift but stock in every other way
I'm an old guy and have little experience with forums so go easy on me.
I have two nearly identical XJ's. A 2000 and a 2001. The 2000 is just fine, it's the 2001 that is giving me a migraine. I say this because I'm swapping known working parts between the two to eliminate possibilities. That being said, here's my problem...
It's hot here now in Nevada, 108 degree average afternoon high (my problem definitely occurs way more often when the weather is hot). My jeep will die at freeway speed if driven at 65mph+ for 10-20 minutes at this temperature. I pull over and turn off the key. It will re-start immediately, but will hesitate and stutter if I don't let it sit and cool for at least 5 minutes. After 5 minutes it will start and accelerate normally back to 65mph, but will die again in a mile or two. If let it cool (with the hood up) for 20 minutes, I will make it another 10-15 miles before it dies again. If I can get off the freeway and take surface streets, it will drive all day with no further issues. So as see it, driving constantly at freeway speed in the heat causes it to die. And letting it cool down definitely helps, so heat must figure into the problem somehow. But at the same time, driving on surface streets where the jeep runs at a higher temp and in a hotter environment, it will run fine. I have swapped out the following parts that I know are functioning properly from my other jeep: Crank position sensor, TPS, ignition relay. I tried the PCM but the 2001 has a skim key and it destroyed the PCM from the 2000 (or so i'm told). DON'T try a PCM swap unless you know what you're doing! The fuel pressure at the fuel rail is good, and fuel will squirt from the test port schrader if pressed immediately after the jeep dies. I've been beating my head against this rock for a few months now with no solution. Any suggestions would be greatly appreciated. Thanks
2001 XJ, 4.0 engine, 140k miles, AW4 transmission, NP 231 transfer case. 3.5" lift but stock in every other way