black smoke

165,000 MILES • 6 CYL • 2WD • MANUAL
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VIPERJR76901
  • MEMBER
  • 1 POST
2000 ford ranger 3.0 ltr flex fuel blows black smoke after running for a few seconds
Jan 28, 2011 at 8:57 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Probable causes of an engine running rich

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.
Jan 28, 2011 at 11:45 AM
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