Hey All. I have a 1988 Ford F-350, crew cab dually. For some reason my forward gas tank isn't working. I've replaced both the internal and external pumps. I can hear them when I turn on the ignition and the guage does register the amount of fuel when I use the in cab selector switch. My last thought is the selector valve. My manual doesn't give the location. I see the resovoir where all the lines (6) are located but not the valve. Are they one in the same? Any help is welcome.
Sam