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2000 Jeep Cherokee lean engine a hesitating

Tiny
CHAMP76
  • MEMBER
  • 2000 JEEP CHEROKEE
  • V8
  • 4WD
  • AUTOMATIC
  • 50,000 MILES
The car runs great, I do have some misfire but not even MODIS from snap on recognizes. The car starts reving up by up to 1200revs. Then goes back to 650 615 revs. After that it starts to try not shutting off and if you dont accelerate it shuts off, if you do you feel when its not having a good combustion response, spark plugs look lean but I checked with my tech and he says 4.7 Jeeps tend to work with lean spark plugs, what do you think? Any idea that can help? MAP, O2, PCV? ECM, TPS?
best regards,
Raul Molina
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Tuesday, March 30th, 2010 AT 10:00 PM

2 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Change the pcv, thats like automatic, such a inexpensive, fix. But next I would check the mapp and the egr valve. The egr may be partially closed or just dirty, your gonna want to clean the throttle body, and check the air intake temp sensor, keep me posted
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Tuesday, March 30th, 2010 AT 10:05 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
https://www.2carpros.com/how_to/how_to_tune_up.htm
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Tuesday, March 30th, 2010 AT 10:07 PM

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