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Re: 91 F-350 fuel pump location?
The fuel pumps are inside the tanks. Ford calls them an FDU, I think, and it is a unit containing two pumps (a high pressure one to feed the engine, and a venturi pump to pull fule from the tank and feed the high pressure one) as well as check valve, etc. Both the feed and returns lines go into this unit, and it has the sending unit also mounted to it.
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07 F350 4X4 XL supercab 6.0 Torqshift Lots 'o options, Line X, Isspro EGT, Trans, Voltage in overhead module, airbags, runningboards,mudguards and coolant filter.
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