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post #1 of 1 (permalink) Old 03-22-09, 10:41 AM Thread Starter
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Fuel pump question 1988 F-350 7.5 EFI

I had to replace the original frame mounted fuel pump on this 1 ton dump truck and it seems like this pump runs all of the time. My fuel mileage dropped and it seems to idle rough. Now the relays/wiring are acting up also, should I replace both relays or???

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