problems running the front tank on a dual tank 97 F250 HD

remove fuel hose at the fuel tank selector switch and see if pump is working, it may be the switch that is not allowing flow from front tank to engine, if not, remove front fuel pump and inspect hoses for pin holes or loose fittings within the tank

I can't find any tank selector switch other than the switch that is on the dash from front tank to rear tank. All the hoses are fine and no pinholes or leaks of any kind.

There has to be a selector valve that has 3 hoses attached to it, o from each tank and one to the engine. look behind the seat or under the cab by tanks

I have found 2 lines that go to the top of the back of the engine. One line goes through the huge in-line filter and the other just runs up to near the fuel pressure regulator. I traced the fuel lines of both tanks and don't see anything that looks like the selector valve at all. All the fuel lines can be traced to their respective tanks.4 to the rear and 4 to the front....supply and return and 2 vacuum lines each. I appreciate your patience with this but I'm seriously at a loss. I have a repair manual for this truck but it doesn't show where it is. There is nothing on the left frame rail nor under the cab.

Check on drivers side frame rail just about half way down

I did. It's all fuel lines. The only big thing is the in-line filter and that's near the front tank.

I have searched every inch of this truck and do not see anything remotely close to the selector valve. I also have pics of the entire area.

Hey I hope I can maybe help you, watch this you be video; YouTube 1987 F150 dual fuel tank selector Repair. https://youtu.be/qBE3LWWmelM

This thread is kind of old but the reason you cant find one is because there isn't one. Ford stop using it in the 90s each pump has its own check valve and the only selector is the switch on the dash. Problem could be in the switch itself or a bad wire connection.

I'm having these problems also. replaced pump and moving on to wires and the switch. If you fixed yours, what did you find?

I traced the 2 supply lines to what looked like a single little block of metal...the check valve maybe? It would have to be cut out and replaced with another one or an electric switching valve would have to be put in it's place. If you can follow the supply line from the huge in- line filter mounted to the frame rail back to the point it splits into 2 lines that should be the check valve.

97 is an older body 97 back.

I have a 97 f350 and its has the fuel tank selector valve so they definitely used em

On that year there is no fuel tank selector the feline in the return line are "t" by the front tank and both tank fuel assemblies have high pressure check valves in them so that it doesn't let the gas feedback in Sol on the fuel pump assembly unit one of the check valves is bad

Change out the fuel selector switch on the dash. Use a tester first to check if that’s the problem first. That was my issue, and it fixed it immediately. It also fixed my fuel hushed to where I could read it on the back tank.

I hsve 1983 f250 no diesel in 8 lines

I have a question to anyone that can please hrlp me i have a 96and half 97 f250 hd and have done away with rear fuel tank 5.8 gas engine only running front or called midship tank ive replaced fuelpump and ig acts like its out of gas its been so full tilk its overflowed tank thrn it ran better ve checked for leaks cleaned tank all that i know to do what could it be thats making it act like its out of gas really have to pedal it ideals fine in oark it revs up fine out in gear and it wobt go hardly at all there for actung like iut of gas please help

1996 F-250 7.5l GAS has NO TANK SELECTOR VALVE