Excessive fuel consumption getting 5 mpg

1996 CHEVROLET SILVERADO
125,000 MILES
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AUTOGO2001
  • MEMBER
  • 1 POST
Smell gas at tailpipe, replaced iat, maf, map, cleaned oxygen sensors,were black with carbon also, replaced spark plugs, wires, rotor, checked vacuum hose, replace o-ring on vacuum hose. when i cleaned oxygen sensors check engine light went off and came back on in about two minutes.
Mar 26, 2012 at 1:45 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
I would look for a bad injector or a leaking fuel pressure regulator.

Roy
Mar 26, 2012 at 1:53 PM
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