black smoke issuse ,any idea what the problem is?

2002 JEEP LIBERTY
130,000 MILES
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JANIE BARRON
  • MEMBER
  • 1 POST
black smoke every time I started
Jan 17, 2012 at 3:14 AM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
Pretty hard to tell with no other clues or observations. Black smoke is a result of too much unburned fuel. That can be caused by a problem or it can be a result of the Engine Computer requesting too much fuel in response to an incorrect sensor reading. Normally there will be a diagnostic fault code and when an increase in emissions is involved, the Check Engine light should turn on. Have you checked for fault codes?
Jan 17, 2012 at 3:30 AM
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