I have an 89 F150 straight 6, 5 speed 2WD. I have never been able to run of
>the rear tank. I confirmed the tank selector switch is good. I replaced the
>selector valve and still nothing.
>
> Well today I went to drain the gas from the rear tank and could not get
> the siphon hose down into the tank through the filler tube. I took that
> out and could not get the siphon in the filler neck half that connects to
> the tank. Mine is the style with the vent tube inside the filler tube. I
> was never able to put gas in the tank. The vent hose came apart in my
> fingers. I ended up pulling the fuel line where it connects to the
> selector valve and drained the old gas. I don't know how long it has been
> like this, but the gas was brown.
>
> Now to fine an inexpensive source for both parts of the filler tube and a
> new sock for the fuel pick up in the tank. Any ideas for sources other
> than LMC at $149 and from what I can tell, it isn't the style that I > need.
>
> Thanks
> Ted
Ted, Save yourself a lot of grief, time and money down the road a bit. Drop the rear tank, take it apart, have it steam cleaned, replace all of the lines up to the selector valve, replace the fuel level sending unit, replace the filler tube, replace the pickup (stanpipe), replace any other part that has been in contact with the old, brown gasoline. In simple terms, replace the rear fuel system in entirety except for the tank, which should be steamed out and inspected for rust/corrosion...Might be overkill but that is what I would do...Good luck....
DaveD