1991 Gmc Sierra Dose Truck Blow Black Smoke Step On Gas

1991 GMC SIERRA
31 MILES
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ANONYMOUS
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why dose my truck blow black smoke when i step on the gas
Mar 25, 2013 at 11:44 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Its running too rich-check the fuel pressure if its within specs-
Mar 26, 2013 at 1:40 AM
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