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Car Forum / Ford / Ford Trucks / February 200896 F250 rear fuel tank bleed fuel to front tank
96 F250 5.4 with dual tanks. The forward tank sending unit has evidently failed. It does not read fuel level at all. Also, when running on the rear tank, the fuel leaches into the front tank. I can run the front tank dry, flip the switch, and after 25-50 miles, flip back top the front and run for a while. I plan on keeping the truck for a couple more years, and would like to fix the problem. Any advice is appreciated. Thanks, MGP > 96 F250 5.4 with dual tanks. The forward tank sending unit has > evidently failed. It does not read fuel level at all. > > Also, when running on the rear tank, the fuel leaches into the front > tank. I can run the front tank dry, flip the switch, and after 25-50 > miles, flip back top the front and run for a while. The fuel is not "leaching" into the front tank. What is happening is, when you are switched to the back tank, the return line valve is not closing off completely on the front tank return port. Replacing the defective electric switch over valve may solve both problems. It did for me on an older model!! Tom J Sounds like the solution. The fuel indication problem was intermitent at first but is now constant. The amount of fuel returning to the forward tank seems to have increased since the problem first appeared. SO perhaps the valve has failed entirely now. Please tell me the valve is not IN the tank :( MGP >> 96 F250 5.4 with dual tanks. The forward tank sending unit has >> evidently failed. It does not read fuel level at all. [quoted text clipped - 9 lines] >for me on an older model!! >Tom J Mine was mounted inside the frame near the front tank. Be sure you mark all the pipes/hoses well and get them back on the same port on the new valve!! Tom J > Sounds like the solution. The fuel indication problem was > intermitent [quoted text clipped - 25 lines] >> for me on an older model!! >> Tom J > Sounds like the solution. The fuel indication problem was > intermitent [quoted text clipped - 4 lines] > > Please tell me the valve is not IN the tank :( The valve is located inside the frame near the front tank. It has 6 ports, so if you tackle the job yourself, make sure you mark all the parts well, so you get it put back together correctly!! Tom J >> Sounds like the solution. The fuel indication problem was >> intermitent [quoted text clipped - 10 lines] > >Tom J I located a device mounted to the frame with only two lines going into it. It is obviously fuel system related and has an electrical connecter. Could this be a newer design with less outlets? I could NOT find anything in the fuel run with multiple connecting lines. Thanks for your help, MGP On Mon, 11 Feb 2008 21:55:04 -0500, floydlawson rearranged some electrons to say: >>> Sounds like the solution. The fuel indication problem was intermitent >>> at first but is now constant. The amount of fuel returning to the [quoted text clipped - 16 lines] > Thanks for your help, > MGP No, that's a fuel pump. >On Mon, 11 Feb 2008 21:55:04 -0500, floydlawson rearranged some electrons >to say: [quoted text clipped - 21 lines] > >No, that's a fuel pump. I thought that might be the pump. So I am assuming the failed valve is in the tank then, unlike Tom's on his older vehicle. MGP |
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