The past 2 weeks my truck has been getting very poor gas mileage. on 2002 Chevrolet Silverado 2500 HD

It smells like it is running rich. Could it be the fuel pressure regulator. I've changed plugs and wires. not sure which way to go from here.

by in Eau Claire, WI on December 12, 2013
2 answers 1 comment
ANSWER by on December 12, 2013
Have it scanned with a real scanner, not a code reader and fuel system pressure checked.
ANSWER by on December 12, 2013
you might want to get a mech opinion if your not equipped to handle suggested tests
COMMENT by on December 12, 2013
'HAVE' it scanned!

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