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    Will it ever run again??

    air and fuel problems. Hard start runs for a few minutes and idles up and down on its own, then dies. Have changed all fuel lines, dropped tank and all looks good there. Added electric pump. Yesterday tried to add a pressure valve on out side of fuel filter no pressure at all. 5lbs on the...
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    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    no the 3.25 was without mechanical pump, with it it stays at the 5 but with air bubbles. That is why we are trying the electric from a fuel can. might help the guessing game.
  3. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    on frame rail in the middle of cab. At the pump its is over 5lbs psi at the fuel filter it is only 3.25lbs.
  4. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    Going to take electric pump and run it out of a fuel can and see if it still does the same thing. That should answer if air is coming from either tank. We love our 1991 f350 dubbed "Betty White" so any help would be great appreciated.
  5. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    will give it a try. so few things that can go wrong with these but holy crap this is a pain.
  6. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    nothing changed when electric fuel pump was added. Still ran bad.
  7. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    dual tank but only use the back tank. Front tank has a rust hole. Switch works fine as far as we know.
  8. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    Ran 3/8 rubber hose for new fuel line from tank to front.
  9. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    Tried it both way with factory pick up pump and by passing it. Still same problem. I know it can only be a few things which is why this is so frustrating.
  10. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    Thanks but has full tank. Dropped the tank and made sure it was clean and in working condition. pick up and sock looked just fine. Thought maybe it was the pick up pump which is why we added electric pump on frame rail. So want this truck back running. It is my daughter love. any other ideas
  11. B

    Air in fuel.....help!!!!!!!!!!!!!!!!!!!

    1991 7.3 f350 please help going crazy. starts up but revs up and down on its own. Dies when you drive. Filter new, return lines and caps new, fuel line from tank new, added in line electric fuel pump. Tested line with clear going into filter and have major air bubbles. This is driving me...

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