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Water in Fuel

Discussion in 'Trucks and Trailers' started by Ssouth, Jan 18, 2003.

  1. Ssouth

    Ssouth LawnSite Senior Member
    Posts: 437

    My father's truck (Ford F-350 diesel) has a light that keeps coming on that says "water in fuel". Is there something he can do to get the water out without having to go to a dealer or mechanic? Is this common and what causes it?

    Any info would be much appreciated.

    Thanks in advance,

  2. Dennis E.

    Dennis E. LawnSite Senior Member
    Posts: 349

    On the top of the motor. Underneath the black plastic "Powerstroke"cover. (Better if you remove it.)
    Where the fuel filter is located there should be a plastic valve that will enable you to drain the water. (Should be down and behind the filter.)My 95 PSD had a red valve. The current one has one that is yellow.You'll know when you look.
    For gods sake be gentle with it. It only goes in one direction and does not need a lot of force to open.Make sure that it is closed properly when you finish! Fuel leaks otherwise....not good.

    It can be a little messy so watch where it drains underneath. Have a good size pan ready.
    (When I have done mine it will usually only take a few minutes)

    The book says it should be done around every 10K for good measure.
    Water.....Thats just one of those things with diesel fuel.

    Good luck.
  3. Ssouth

    Ssouth LawnSite Senior Member
    Posts: 437

    Dennis E.,
    Thanks for the help.

    Another question, does anyone know where the fuel shut-off is for a '97 Ford f-350. The manual states that is under the instrument panel, but my father is having a hard time finding it. He seems to think someone may have removed it.
  4. Dennis E.

    Dennis E. LawnSite Senior Member
    Posts: 349

    The fuel pump shut off switch is on the passenger side. It's in the foot well by the kick panel.
    What are you up to?
    You don't need to shut the fuel off to drain the water from the fuel filter container. (If thats why you're asking about the shut off.)

    BTW... you should be able to see the drain valve from the passenger side when you look for it.I forgot to mention it.
  5. Ssouth

    Ssouth LawnSite Senior Member
    Posts: 437

    Dennis E., My fathers truck just quite on him today for no reason. He said it sounded like he wasn't getting any fuel. I thought the problem could be water in the fuel or somehow the shut-off got tripped. I'm going to see him tommorrow, so I just wanted to check the simple things first. If it's the fuel pump, would it be located inside or outside the tank. I'm assuming outside, since it has duel tanks.
  6. Greenie

    Greenie LawnSite Member
    Posts: 105

    I've been using Stanadyne Performance Formula for six years now - it seems to handle water in the fuel well. There is never any water in the fuel filter sump when I use it.
  7. Dennis E.

    Dennis E. LawnSite Senior Member
    Posts: 349

    What symptoms did it have before it shut down?
    When was the last time the fuel filter was changed?
    Besides a fuel problem it could also be a case of a dead CPS.
    (Cam Position Sensor)
    Check both batteries also.
  8. cat320

    cat320 LawnSite Senior Member
    Posts: 822

    I had it in my truck drained the water from the outlet provided changed the filter is a must if your water in fuel light comes on then used diesel fuel additives that absorbe water.Just keep doing that and it will be fine but the filter is the biggest part of it.
  9. Ssouth

    Ssouth LawnSite Senior Member
    Posts: 437

    Guys, thanks for all the help. As it turned out it had something to do with a secondary computer. ( The one that tells the engine when to fire).

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