car hesitation

2003 KIA SEDONA
88,000 MILES • V8 • FWD • AUTOMATIC
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FREDAG
  • MEMBER
  • 2 POSTS
car smokes and burns gas fast and is hard to get up a bridge
Jan 24, 2011 at 10:18 PM
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FREDAG
  • MEMBER
  • 2 POSTS
Im having poor gas miledge and black smoke and hesitation and hard to get up a bridge
Jan 24, 2011 at 10:24 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1.Excessive fuel pressure can be cause by restricted fuel return line
2.Defective Oxygen Sensors.
3.Leaking injectors and fuel pressure regulator.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
Mar 17, 2011 at 10:09 AM
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