1987 ford E350 460 7.5L backfires
acquired a 87' E350 econoline w/ 460 7.5L EFI cab over motorhome. this thing sat for some time owner told me "the fuel pump needed to be replaced, parts are there" replaced parts given (fuel pump, ...
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You've got more problems than fuel supply and that's the backfiring. The fuel is being ignited when the intake valve(s) are still open.
