PlayboyJoeShmoe
Flashaholic
My Dads 1991 F150 has always pumped gas from front to rear. Before you ask, the check valve on the pressure line is A-OK. With the tank out, the truck was running with the check valve on the main line and the return stopped off. In that confige it would go about 200 miles + - on a front tank fill.
With the return open, when the truck is running gas will come out of it at a GOOD clip. There is NO valve or switching mechanizm telling the return where to go. IF the front tank return was a problem, why did it run fine with the back tank out and the lines closed off?
We put a new fuel pump in the rear tank, because it wouldn't run on the rear anymore. We put the rear tank back in today, and I had him put in only 3-4 gallons to see if it would run on the rear. It would not.
With a full front tank, at 76 miles on the odo, it ran out of gas. It was all in the rear tank. We have a diagram of the rear tank, and from what I can tell, the wiring is correct. MAYBE not.
But the main question is why is all of the gas so hell bent on getting to the rear tank?
Like I said in the title : /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif
With the return open, when the truck is running gas will come out of it at a GOOD clip. There is NO valve or switching mechanizm telling the return where to go. IF the front tank return was a problem, why did it run fine with the back tank out and the lines closed off?
We put a new fuel pump in the rear tank, because it wouldn't run on the rear anymore. We put the rear tank back in today, and I had him put in only 3-4 gallons to see if it would run on the rear. It would not.
With a full front tank, at 76 miles on the odo, it ran out of gas. It was all in the rear tank. We have a diagram of the rear tank, and from what I can tell, the wiring is correct. MAYBE not.
But the main question is why is all of the gas so hell bent on getting to the rear tank?
Like I said in the title : /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif /ubbthreads/images/graemlins/Christo_pull_hair.gif