Fuel Tank Selector Valve?

Hmm just seeing pic first page didn't show up hope this one is better but it can also be the valve

Let's see if this one works. Sorry about this.

Good afternoon,

The fuel tank switching valve is where the valve is located. You need to replace the valve. That is the one where all the lines come together under the truck.

I attached a picture of the new valve and the location for you to view.

Roy

PURPOSE
The fuel tank selector switch is a driver controlled device that controls which fuel tank the vehicle is operating from. It also controls the switching between the fuel gauge senders in the tanks.

OPERATION
Voltage from fuse 6 is supplied to the fuel tank selector switch when the ignition switch is in START or RUN. The position of the fuel tank selector switch determines the direction in which the fuel tank selector valve motor will move. It also determines which fuel tank sender will control the fuel gauge operation.

Your truck has a Fuel Selector Valve. ($65 or so)
if your rear tank isn't working and you don't plan on using it, just plug the line which lead from the front tank to the fuel selector valve [not the one which send fuel to the engine.

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). Anyway repalcing the rear pump should cure the problem. 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. So replacing the rear tank's fuel pump assembly should cure the problem.

Sorry about the mix up. I called a buddy who works at a very good auto parts store and he said that they sold one for your truck, which led to the confusion. Please let me know how this all turns out. And of course, let us know if you need any more assistance.

Good morning.

There is a switching valve for the tanks. It directs fuel to the front as well as the return.

This vehicle does not use an external fuel tank switching valve. A supply check valve in the fuel pump assembly opens when the outlet pressure from the energized fuel pump exceeds the opposing check valve spring force.

It may be tough finding one considering the year of the truck.

Roy

Try cleaning throttle plate on both sides and iac hole with choke cleaner. If it continues check fuel pressure with a gauge and for a vacuum leak. See pic for location

It sounds like the fuel selector valve is bad here is the location in the diagrams below.

Hello,

Those trucks had a big problem with the switch valve down on the frame rail between the tanks. Here is a diagram (below) of what the valve looks like.

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

When you buy the pump, it will ask which system you have. I would go to ROCKAuto. Com and do a search. Let me know what you find.