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91 f150 fuel issues

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Old 01-14-2012, 02:57 PM
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Default 91 f150 fuel issues

I just got this truck on Sunday. It has sat for awhile but was ran monthly.

Issue is with th fuel delivery. I can idle no problem. Once I push the gas the Rpm will
Sometimes go up and sometimes the truck will stall. I searched the forum and it points me towards a tank selector unit. Or the pump in the tank.
Ok problem is that I tracked back from both pumps and do not have a selector unit. It only has one pump in each tank and they join at a "y" and then go to the fuel filter.
Is this normal for a 91?? Or am I missing some stuff?
Old 01-14-2012, 03:31 PM
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You are missing your Dual Function Reservoir (DFR)
Old 01-14-2012, 03:46 PM
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On where is it supposed to be. I know the frame rails, but there should be a wiring connector empty
Somewhere... Nothing is there not plugged in
Old 01-14-2012, 05:43 PM
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That's how it's supposed to be. '89 was the last year that had the DFR.
Old 01-14-2012, 10:59 PM
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Ok so I am good. My only pumps are in the tanks. Ok thanks
Old 01-15-2012, 09:31 PM
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Pulled the rear tank today. The sending unit and pump are shot. Also the tank is pretty rusted.

Going online to order my parts to ought and I'll have it back up and running when they get here.
Old 01-18-2012, 02:54 PM
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Ok new fuel lines, fuel filter, new tank, and new sending unit and pump.....

I got my gauge back and she runs great again.

I'll hold off on the front tank till it warms up. One good tank will work since I got a gauge to keep an eye on gas level



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