2002 Geo Tracker misfiring

2002 GEO TRACKER
15,300 MILES • 6 CYL • 4WD • AUTOMATIC
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SASUWO
  • MEMBER
  • 1 POST
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
Apr 5, 2010 at 2:54 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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.
Apr 5, 2010 at 3:02 PM
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