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Engine running rough/missfiring after 4wheeling

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Old Jun 27, 2009 | 01:11 AM
  #1  
00XJCO's Avatar
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From: Fort Collins, CO
Year: 2000
Model: Cherokee
Engine: 4.0 I6
Default Engine running rough/missfiring after 4wheeling

After wheelin my rig quite a few times so far this year, I have noticed that almost every single time without fail, when I shut off my engine and restart it, it runs extremely rough, often so bad it nearly stalled (and has a few times) but then returns to running normally and very strong. I'm completely stumped as to what might be causing this. When I start it up it sputters so badly it's like it's not getting gas/air/spark to half the motor but after a minute or so it's right back to normal.

Has anyone else had this issue, or any possibilities for advice as to what it might be?

-00XJCO
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Old Jun 27, 2009 | 02:00 AM
  #2  
liftedjeepxj's Avatar
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Joined: Jun 2009
Posts: 1,415
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From: Las Vegas, NV
Year: 1999
Model: Cherokee
Engine: 4.0L
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Maybe your jeep needs a bigger lift or a new set of tires :P

Hope you get some good info incase i run into the same problem!!!
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Old Jun 27, 2009 | 02:37 AM
  #3  
BuckB91XJ's Avatar
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Joined: Nov 2008
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From: Oak Harbor, WA.
Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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Sounds like (CPS) could be about ready to take a dump. That controls spark timing and fuel injector fire pulse timing.
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Old Jun 27, 2009 | 08:59 AM
  #4  
jonnyb78's Avatar
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From: Strong Island, NY
Year: 2000
Model: Cherokee
Engine: 4.0
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does ur cel come on? i had the same problem i think as ur describing. i was getting a random misfire in multiple cyl or sometimes in just one cyl. what i did and it seems to be fine now is loaded up my spark plugs with dielectric grease
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Old Jun 27, 2009 | 10:01 AM
  #5  
BuckB91XJ's Avatar
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From: Oak Harbor, WA.
Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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Just had a nother thought. If it is only after 4wheeling and then it straightens out afterward. You may be gettng water in your distributor or coil.
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Old Jun 27, 2009 | 10:32 AM
  #6  
Chucknormous's Avatar
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Year: 1995
Model: Cherokee
Engine: 4.0 HO straight 6
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i have had this same problem after hauling a boat for a long distance. although it hasn't happened since my tune-up
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