1998 GMC C2500 My truck is running super rich

1998 GMC C2500
180,000 MILES • V8 • 2WD • AUTOMATIC
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BMXRIDER439
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My truck is running real rich where you can smell gas in the exhaust which also is real black, and i am now getting like 7 miles a gallon. i am trying to get some information on what could be the problem.
Feb 15, 2008 at 3:15 PM
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RASMATAZ
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For a start check the fuel pressure could be excessive, problem with the fuel pressure regulator,clogged return line and injector/s.
Feb 15, 2008 at 3:19 PM