Your truck has a Fuel Selector Valve. . Where is it located at? However, what I'm unsure of is whether or not this truck has a fuel tank selector valve, or just the switch on the dash and the 3 pumps. I have seen so many conflicting statements about the components of the fuel system on this truck since I am experiencing a problem where when I use the front fuel tank rear fuel pump is not working , fuel is running back into the rear tank and causing it to overflow. I do plan on replacing the pump to be able to use the rear tank. Anyway repalcing the rear pump should cure the problem.
So replacing the rear tank's fuel pump assembly should cure the problem. According to the parts store sites, it's on the left rail behind the driver door. This truck has a fuel pump in each tank and another along the rail if I read everything correctly. I have a 1992 Ford F-150 with a 4. As I understand it the pump assembly have a check valve which prevents fuel from flowing into the tank through the fuel line from the other tank.
When you flip the switch on the dash, you get nothing on 'rear', but the front pump buzzes like a champ when you switch to 'front'. It also has the dual tanks. Otherwise you need to replace the rear pump and the fuel selector valve. I fouund out that there is no fuel selector valve on this truck because of the year model and the fact that you have a switch on the dash. Thanks for the quick reply.
Also, whether or not this issue would be solved by replacing the rear pump, which I believe has the check valves inside them. . . . . . .
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