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2002 Geo Tracker misfiring

Tiny
SASUWO
  • MEMBER
  • 2002 GEO TRACKER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 15,300 MILES
Engine is misfiring when warm, wires and plugs have been changed. The map sensor was changed also, the misfiring has continued,

the vehicle was taken to advanced auto for a engine code check and said cylinder 6 is misfiring and the map sensor is out, a new map sensor was put in earlier by a couple days,

any help is appreciated
thanks
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Monday, April 5th, 2010 AT 2:54 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi sasuwo, Welcome to 2carpros and TY for the donation.

Misfire at a specific cylinder which is no.6 -you check and test the compression and injector for that cylinder.

Engine running rough or misfiring can be cause by the following:
1. Defective spark plug.
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
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Monday, April 5th, 2010 AT 3:02 PM

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