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horrible fuel mileage

821 Views 4 Replies 3 Participants Last post by  POWERSTROKER1
ok guys, had fuel leak, replaced lift pump, no more fuel leak. fuel filter is fresh. no blue smoke so i figure my injector o rings are in good shape. im getting between 9-11 mpg. is it possible that the copper rings are leaking on my fuel injectors? its the only thing i can think of. any suggestions? thanks
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air filter??
fuel system cleaner?? injectors may be clogged
compression test??
air filter is clean. can you suggest a fuel system cleaner? never done that before
Sea Foam is a good fuel system cleaner.
When I change my fuel filter I buy 2 cans of Sea Foam. one goes in the fuel bowl and the other I dump in the fuel tank.
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