Fuel system- Dual tanks

385

Asked by Oct 15, 2009 at 07:51 PM about the 1990 Ford F-150

Question type: General

Can anyone explain to me how the Dual tank fuel system works in a 90 or so model? Thanks.

7 Answers

125

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

12 people found this helpful.
385

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?

15 people found this helpful.
275

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

10 people found this helpful.
385

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.

20 people found this helpful.
275

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

10 people found this helpful.
50

How does the fuel tank work on 7.3 V8 f250

5 people found this helpful.
90

Two tanks one pump or two pumps

9 people found this helpful.

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