Hesitation/Loss of Power after 1min.
#1
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Year: 1998
Model: Cherokee
Engine: 4.0
Hesitation/Loss of Power after 1min.
I'm new to the jeep world. My buddy was deploying to iraq and gave me his 1998 XJ 4.0 as a wedding present.
The only issue I'm having with the thing is that after a cold start it will start fine, but then after about a minute into driving the engine will hesitate for about 5 seconds and then I will hear a backfire from under the hood and all power returns. This happens about twice before the thing has warmed up. When the engine is warm everything is fine. I have checked the basics and everything seems fine. I'm open to any suggestions.
James
*** PRE CAT O2 SENSOR FIXED PROBLEM ***
The only issue I'm having with the thing is that after a cold start it will start fine, but then after about a minute into driving the engine will hesitate for about 5 seconds and then I will hear a backfire from under the hood and all power returns. This happens about twice before the thing has warmed up. When the engine is warm everything is fine. I have checked the basics and everything seems fine. I'm open to any suggestions.
James
*** PRE CAT O2 SENSOR FIXED PROBLEM ***
Last edited by XJBeater; 04-03-2009 at 10:15 AM. Reason: FIXED
#2
Perhaps you should go to the repair factory. I think that it's ok. I'm sorry for this problem. I didn't meet the seem problem
#3
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Year: 1998
Model: Cherokee
Engine: 4.0
FIXED : Put in a new pre cat. O2 sensor and it fixed the problem. The strange thing is I had no faults for the 02 Senor or heater circut. The problem I was having was when the DME would switch from open to closed loop. The DME thought the O2 sensor was up to operating temp, but it really was not. I bet this caused the car to go very lean for about 15 seconds.
The simple fact is this fixed the Hesitation problem. I have read many posts and everyone is clueless, but you veteran posters do know about Tires/Lifts. The thing is they dont help you out if your car doesn't run.
The simple fact is this fixed the Hesitation problem. I have read many posts and everyone is clueless, but you veteran posters do know about Tires/Lifts. The thing is they dont help you out if your car doesn't run.
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