Fuel system- Dual tanks

215

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.

5 Answers

35

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

3 out of 3 people think this is helpful.
215

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?

7 out of 7 people think this is helpful.
185

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

5 out of 5 people think this is helpful.
215

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.

11 out of 11 people think this is helpful.
185

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

7 out of 7 people think this is helpful.

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