Tank selector switch is set to the front tank which is almost full of fuel. The rear tank is empty. When I switch to the front tak, there is a click noise that comes from the tank selector valve. The truck does not start - it continues to turn over as if it were out of gas. The selector valve would not normally make any noise when changing tanks, which makes me think it is going/gone bad.
I connected the fuel line directly from the front tank to the fuel pump and bypassed the selector valve. Truck runs great and I can still use the selector switch to see how much fuel is in each tank.
Question: How would I go about testing the valve to be sure it is actually the valve that is bad and not something in the switch? The fuel selector valve has one wire - I have not followed it to find out where it leads to. I picked up a new universal selector valve from Napa - but I would rather confirm that the other one is toast before I install this one.
Note: The switch is used to change the tanks and the dash fuel gauge. ============================================
1973/74 F100/350's used a manually controlled brass selector valve that mounts on the floor adjacent to the drivers side of the seat.
The heater control panel mounted switch (D3TZ-9A050-A) only changes the fuel gauge from one tank to the other.
Last edited by NumberDummy; 07-05-2011 at 01:06 PM.
Reason: Post edited to add more info and for clarification.
1975/79 F100/350's with dual fuel tanks use: D5TZ-9189-B .. Fuel Tank Selector Valve & Solenoid Assy which mounts on the frame rail.
The switch: D5TZ-9A050-A mounts into the heater control panel, switches the tanks and the dash fuel gauge.
1973/74 F100/350's used a manually controlled selector valve that mounts on the floor adjacent to the drivers side of the seat. The dash mounted switch only changes the fuel gauge from one tank to the other.
Thank you for the part numbers. Since I disconnected the fuel line from the fuel selector valve, I was able to locate it. I am not sure how I would use this info to check and see if my existing valve is bad or not.