Fuel return question - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 04-18-2013, 01:43 PM Thread Starter
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Fuel return question

I have a 1996 F350 dually with the powerstroke engine and has the factory dual fuel tanks. Does the fuel return divert the unused fuel back into the selected tank or does it split it back into both tanks? I cannot use the front tank because it wont fill up and I haven't done a vent mod yet. The front tank was next to empty so I have been using the rear tank only. After putting about 7 tanks of diesel through the rear tank, I was curious to how much I had in the front tank and switched over while driving. I now have a little more than a quarter tank in the front. I have not added any diesel to the front, only the rear, yet I have mysteriously added fuel to the front. That made me suspect the fuel return divided the excess fuel into both tanks. Can anyone confirm this? Thanks!
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post #2 of 5 Old 04-18-2013, 01:52 PM

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Usually it diverts to both, rite back to the selector valve, but that makes me wonder since I primarily only use my front to keep my wallet happy at the pumps lol, but gotta love a regulated return

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post #3 of 5 Old 04-18-2013, 02:02 PM
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It "should" return to the tank that it is pulling from...but I could see the possibility of an internal leak In the selector valve that could let some find its way back into the other tank. Weirder stuff happens on a regular basis!

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post #4 of 5 Old 04-18-2013, 03:35 PM
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post #5 of 5 Old 04-19-2013, 06:26 AM
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yep, it does switch both feed and return.....like he said above tho, if the Walf is leaking inside, (read dirty messed up Walf), then you could get some fuel back into the un-selected tank

Oh, and that's my Swedish impression for the day....

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