Duel tank problems
#1
Duel tank problems
I have an 88 f150 with duel fuel tanks. My front tank is constantly being refilled from the back tank to the point of overflowing. Any tech advice would be appreciated.
#3
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Location: Memphis, TN, Earth, Milky Way
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On pre-'90 EFI trucks, it's a different system, and a different failure. It's the O-rings inside the DFR, which is explained in the captions of this album:
(phone app link)
(phone app link)
#4
Senior Member
^^^Crap I don't know how I missed it was 88 - this is why I tag you.
#5
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IDK what tagging is - I just browse the forums now & then, and look for threads I think I might help with.
#6
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#7
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I probably have PMs turned off. They got abused on several forums I've used in the past, so I usually do that when I'm setting up my accounts now.
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#8
Junior Member
I have a newer truck but in my friend's 1996 f150 he has the same issue. We discovered it to be the fuel rail return which only vents to the 'main' tank. He discovered the issue since his front tank pump has failed and was only using the rear tank, and one day he looked in his mirror and saw fuel spraying from his front tank fill nozzle.