wont run on front tank

[OBSPSD]

ok guys here's my dilema. my truck runs off the rear tank just fine and SOMETIMES it will run fine off the front tank but when i'm using the front tank it will randomly start acting like its running out of fuel and i have to switch back to the rear tank. it will do it when the front tank is full, empty, or anywhere inbetween. at first i could run a couple tanks of fuel threw the front tank before it would do this but now its becoming more and more common and i can't really use my front tank anymore. whats wrong guys??? thanks for any help or advice

[97powerstroker]

maybe holes or cracks in front tank lines or pickup tube.

[troid123]

weak pump?

[miked.]

sounds like trash rolling around in the tank

[ridiculously_necessary]

could be a failing pollack valve as well...

[OBSPSD]

i've checked all the lines and tubes, can't be the pump cause it runs fine off the rear tank, no trash in the tank cause its a brand new tank and whats a pollack valve??

[97powerstroker]

its the it valve that switches tanks.mine went bad and i hit the button to switch over to the rear tank.....about 20miles later i found out that it never switched.......i was on the side of the road out of gas.it had quit on the front tank and wouldnt switch anymore so 200 bucks later after ford got ahold of me it was back to normal.although when mine went the fuel gauge pegged full and wouldnt work,caused from infinite resistance.

[Jarrod B]

its the tank valve on the frame or your sending tube in the tank. both are in the $$$ range.