I was told to check the tank selector valve that keeps fuel from going into the opposite tank. All that I can find is a simple Y connector before the fuel filter that converts lines from the back and front tank into one line to enter the filter. My questions are: 1) Does my 1990 F150 4.9l have a tank selector Valve? If so, where is it?
Dec 16, 2011 · The fuel tank selector valve on a 1993 Ford F150 with a 4.9L engine is on the left side frame rail under the driver side floor pan forward of the side fuel tank in-line on the fuel lines. Follow the fuel lines from the side tank forward until you see the selector valve. The rear tank is new and started pushing fuel to the front tank which has a pinhole. so half my gas is getting dumped on the road. Is it possible to bypass the front tank by plumbing in some gas line hose so I won't have to replace an expensive selector valve.