more dual tank problems
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more dual tank problems
okay i already posted this in the fuel board, with no luck, maybe i can get some help here. 1990 f250 with dual tanks. switched to rear and both pumps run, switched to front and neither run. ALL fuel from the rear goes to the front and overflows it while drving. anyone have ideals. and btw for more info check out the fuel system board under "possible wiring problems" thanks
Last edited by Chuck88; Sep 21, 2006 at 08:02 PM. Reason: more info
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From: West Chester
The filling the other tank issue is the Dual Function Resevoir is bad. Special order from Ford Dealer about $85.00 The other sounds like the switch is bad. Dealer also or junk yard.
Been there, had these problems.
Good luck
Been there, had these problems.
Good luck
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Junior User
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i got a new switch and dual function resouivor today. the switch didn't help. i'll try putting the dfr on when the rain lets up. i don't think the truck has one now, if it does i've never seen it.
Fleet Owner
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From: Easton,Ks
No your truck does not have one, 1989 was the last year for the dual function reservoir in the F-series, the E-series used it in 1990.
You need to get the wiring right first and then if the rear pump runs and the front one overflows the front pump is bad.
Here is some diagrams of your fuel system:
http://i54.photobucket.com/albums/g9...FielSystem.jpg
http://i54.photobucket.com/albums/g9...el1990F150.jpg
You need to get the wiring right first and then if the rear pump runs and the front one overflows the front pump is bad.
Here is some diagrams of your fuel system:
http://i54.photobucket.com/albums/g9...FielSystem.jpg
http://i54.photobucket.com/albums/g9...el1990F150.jpg
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ok thanks. can anyone tell me where the ground for both pumps meets at. i think that has something to do with it because it all started when i tried to fix the ground wire at the rear pump. are they grounded to the rear end?
Fleet Owner
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From: Easton,Ks
I do not know on the 1990 but on the 93-96 it was the LH front of the engine compartment, on upper radiator support. It seems like that somebody may have said at one time that it was under the dash on a 1990.
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Fleet Owner
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From: Easton,Ks
Originally Posted by Chuck88
subford, do you think that could cause both pumps to kick on when the switch is on rear?
Look at the diagram above and you will see what I mean.
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From: Easton,Ks
Originally Posted by Chuck88
ok any other ideals on what would cause this, besides a switch