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1998 Jeep TJ runs well then runs poorly

Tiny
FWWR
  • MEMBER
  • 1998 JEEP WRANGLER TJ
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
Hello

My jeep will run will for a while and then it will start to miss fire, it will back fire and will operate on a few cylinders. RPM will go up and down on its own. Can not stay still in park as idle will go up and down have to put car in neutral to stay still. Car will idle ok when not in gear but will stutter when load is put on the motor. Then, the problem will just stop and the car will run ok again. Usually the car starts and runs fine and then starts to do this after 5 to 15 min of operation. Is there anything I can do? Thanks

FWWR
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Friday, May 8th, 2009 AT 3:16 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Need to verify good fuel pressure the entire time with amanual gauge. It almost sounds like the fuel pump may be weak or the filter is plugged up. If the check engine light is or has come on, have it scanned for codes to give us a place to start
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Sunday, May 10th, 2009 AT 8:29 AM

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