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