Emmision

Tiny
SLY
  • MEMBER
  • 2006 CHEVROLET AVEO
  • 4 CYL
  • 2WD
  • AUTOMATIC
My bring out black smokes and consumes fuel
Tuesday, February 15th, 2011 AT 3:24 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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
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Tuesday, February 15th, 2011 AT 3:26 PM

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