Fuel system- Dual tanks

what do you want to know other than its two separate smaller fuel tanks

How it works. does it feed from both front and the rear or does it pull fuel from just the rear and siphons fuel from the front?

the system draws from on tank until the switch is flipped then thit activate a module down on the frame rail just behind the cab between the rail & the front tank, that tells witch fuel pump to turn on, wich is likley the cause if your truck will oinly pull fron one tank

well here is the freaky thing. I think it was siphoning fuel from the front tank to the rear tank. I flipped the switch to the front tank and started driving, then i flipped it back to the rear tank and it was full, whereas before i had a quarter of a tank in the rear.

the switch module on the frame is toast. there is check valves in it so that doesnt happen

How does the fuel tank work on 7.3 V8 f250

Two tanks one pump or two pumps

My 1993 F-150 has to fuel tanks, which one should I use, please help?

My 1995 F-150 won't start it turns over good but won't start I replaced the dual tank switch which is what they said was wrong it ran for a couple months now the same thing happened again can I eliminate the dual tank switch and just use the front tank

11/1993 4.9 has no switch moduall or high pressure pump. The pcm controls the pump pressure. Note, the pcm is receiving inputs from a variety of inputs,

I'm having the same issue where it seems like gas is being siphoned from one tank to the other and I'm wondering if anybody has a quick fix for this or if that module just absolutely has to be replaced? I don't mind using only one tank for the time being if that is doable. Thank you in advance

I have a 1997 Ford F-350 with dual tanks I want to do it with the back tank how can I do it with that

So there's no way you can do away with back tank

If both the front and back tank are full which one should I use first?

You could use the front or the rear doesn't matter

I have replaced both fuel pumps and all the lines the fuel filter and the fuel still will not pump up can anyone help me cause i still cannot get my truck to start.pressure regulator

And i also cannot hear the front pump kick on the back one does not the front i thought i got a bad pump so took it back and parts store replaced it for me stll cannot hear it kick on can hear back one kick on not front one

Maybe it's the fuel pump relay, have you checked for power to the fuel pumps.

What do I do if I put gas in my diesel truck 1990 F250

sell it

I thought it was a looped system.

I have a 1985 F-150 XLT it has dual tanks it doesn't matter which tank I'm on after a while it starts acting up like there's no gas in the tank if I switch from the rear to the front it stops but then it starts up again even though it's on the front so I switched back to the rear and it will go for a while and then it act up again like it has no gas I need to know if the fuel pumps in both tanks are bad or if it's the fuel switch that could be bad

I have the same issue as you @hawkman68 — any luck? I have. 94 f250 460 engine

I have duel diesel tanks. The front tank has a hole in it can I still use my truck with only the rear tank?

Could be water in the fuel.