1994 Saturn SL1

Tiny
AAJR1971
  • MEMBER
  • 1994 SATURN SL1
  • 4 CYL
  • 2WD
  • MANUAL
  • 149,000 MILES
When I start the car shakes and black smoke come out tail pipe then it idle high
Friday, June 25th, 2010 AT 5:17 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 or defective fuel pressure regulator.
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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Friday, June 25th, 2010 AT 5:23 PM

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