1994 Ford F-150 fuel black smoke

Tiny
SRCH
  • MEMBER
  • 1994 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Engine runs rough like to mutch fuel
Sunday, May 16th, 2010 AT 4:41 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1. Fuel pressure not within specs. Can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
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Monday, May 17th, 2010 AT 12:38 AM

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