1994 F-250 460 rear fuel tank not working.?

I recently purchased a 94 F250 with a 460, only 120,000 miles and in great shape. I noticed after purchasing it that the rear fuel tank does not work. When switching from the front to rear tank the truck quickly stalls out and will not restart until I reengage the front tank. I ve been researching for a little bit

I recently purchased a 94 F250 with a 460, only 120,000 miles and in great shape. I noticed after purchasing it that the rear fuel tank does not work. When switching from the front to rear tank the truck quickly stalls out and will not restart until I reengage the front tank. I ve been researching for a little bit and found that it could be a number of things from the selector switch, the selector valve, or of course the fuel pump in the tank. Before I replace all of these parts can anyone help me narrow it down, what part is more likely and what I should start with. Thanks!

Best Answer:

Matt: You'll need a wiring diagram of the tank selector/switch circuit and then check for power and ground starting at the pump harness. If you get power and ground there when the dash switch is in rear tank setting/engine running, then the pump is bad. If no power, then check at the selector switch ….or loose connections/corroded/broken wiring, etc.. Make sure the ground wire connection is good at the rear tank pump harness …you need power and ground to complete a circuit.

Wiring diagrams….
http://arrc.ebscohost.com/statics/p5/ima…

http://www.ford-trucks.com/forums/973552…

Other answer:

Matt:
Check that the primer is working, and of course you have fuel.
Skoda John:
Check power to the rear fuel pump.
If no power then trace the failure.
If there is power the pump is the prime suspect.
JetDoc:
Is there actually fuel in the rear tank?

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