Eliminator89
NAXJA Forum User
- Location
- Winona, Mn
Contiuing problem. '01 XJ, 4.0 AW4, NP231, all stock, about 125K miles, street drivien, not abused.
Jeep was driving just fine, then loses power and dies. I pull over and restart but it idles rough and slow and gets rougher and slower util it dies. Restart several times with same rough, slow idle. It won't rev up at all. A couplr of times while depressing accelerator pedal, it backfires through the throttlebody.After a couple more restart tries, It restarts and runs fine.
I make it another mile down the road and it does it again. After several restart attempts, it refires, runs fine and I continue on my way. Then as I reach my friend's place (about another mile), it does it again.
After a few hours (working on a hotrod I'm building), I try to go home. It restarts, idles slow and rough, won't rev, idle gets rougher and slower, then it dies. It does this several times, then starts and runs fine. Revs good, idles smooth. I put it in gear and make it about 10' and the rough running returns. I put it in neutral, it idles rough and slow and dies. I take his XJ home leaving mine there.
It starts fine, pretty much everytime I try it. But there's no power, no ability to rev the engine, it idles rough and slow and then that gets worse and in a few seconds, its dead.
I had this problem a couple months ago. It died on the highway, after a few attempts to restart it (it restarted several times but with a rough, slow idle and no power) it restarted and was fine the rest of the day. Was fine for several days. Then while driving, it died again but restarted before I even got stopped and ran fine again. Then about a week later, it stumbles while driving but never got bad that time.
I replaced the CKS. See my previous post: This is fun?
So, here I am today. Stumbles badly and dies. Will restart but idles rough and slow which quickly gets worse and then it dies. While idling rough and slow, it won't rev. Problem started about 2 months ago, seemed to heal itself, then reappeared a couple times, the CKS was replaced and all seemed good until today.
There are no codes. I have an Auto Xray unit. There are no stored cades, no CEL.
It seems there is spark and fuel or it wouldn't restart and run at all. Spark timing or injector timing seems to be way off during these spells. With the new CKS, I am leaning towards a bad/intermittant CPS. But there is no code.
Fuel pump runs normally at start up. I turn the key on and hear the pump run for a second or two. Sounds good, smooth. That was replaced about 14 months ago.
Anyone have any ideas about this? HELP!
Jeep was driving just fine, then loses power and dies. I pull over and restart but it idles rough and slow and gets rougher and slower util it dies. Restart several times with same rough, slow idle. It won't rev up at all. A couplr of times while depressing accelerator pedal, it backfires through the throttlebody.After a couple more restart tries, It restarts and runs fine.
I make it another mile down the road and it does it again. After several restart attempts, it refires, runs fine and I continue on my way. Then as I reach my friend's place (about another mile), it does it again.
After a few hours (working on a hotrod I'm building), I try to go home. It restarts, idles slow and rough, won't rev, idle gets rougher and slower, then it dies. It does this several times, then starts and runs fine. Revs good, idles smooth. I put it in gear and make it about 10' and the rough running returns. I put it in neutral, it idles rough and slow and dies. I take his XJ home leaving mine there.
It starts fine, pretty much everytime I try it. But there's no power, no ability to rev the engine, it idles rough and slow and then that gets worse and in a few seconds, its dead.
I had this problem a couple months ago. It died on the highway, after a few attempts to restart it (it restarted several times but with a rough, slow idle and no power) it restarted and was fine the rest of the day. Was fine for several days. Then while driving, it died again but restarted before I even got stopped and ran fine again. Then about a week later, it stumbles while driving but never got bad that time.
I replaced the CKS. See my previous post: This is fun?
So, here I am today. Stumbles badly and dies. Will restart but idles rough and slow which quickly gets worse and then it dies. While idling rough and slow, it won't rev. Problem started about 2 months ago, seemed to heal itself, then reappeared a couple times, the CKS was replaced and all seemed good until today.
There are no codes. I have an Auto Xray unit. There are no stored cades, no CEL.
It seems there is spark and fuel or it wouldn't restart and run at all. Spark timing or injector timing seems to be way off during these spells. With the new CKS, I am leaning towards a bad/intermittant CPS. But there is no code.
Fuel pump runs normally at start up. I turn the key on and hear the pump run for a second or two. Sounds good, smooth. That was replaced about 14 months ago.
Anyone have any ideas about this? HELP!
