need help with 2004 F250 Diesel

Discussion in 'Trucks and Trailers' started by PatiosInstalled, Feb 27, 2008.

  1. PatiosInstalled

    PatiosInstalled LawnSite Member
    Messages: 114

    ok i have two questions

    first: Does anyone know what esso diesel is? i was at the pump the other night and filled my truck up. when i was done i noticed the pump i used said in big letter ESSO Diesel and the pump next to it just said diesel. im just wondering if there is a difference.

    second: since the other night i have heard a buzzing sound from under the truck. so i climbed under it and its coming from a gatorade bottle sized black cylinder mounted to the frame right under the drivers seat. im pretty sure this is the fuel pump is it? it buzzes while the truck is on and continues for about 30 seconds after i turn it off but leaving the key in tho on position. what is casing this???

    thanks Nick
  2. OhioMowerGuy

    OhioMowerGuy LawnSite Senior Member
    Messages: 325

    Id ask them questions on You should some quick replies over there
  3. DK lawn care

    DK lawn care LawnSite Senior Member
    Messages: 763

    or go to Its free to sign up and they have a superduty (250, 350, 450, 550, 650 and 750) forum and a 6.0 forum their to. Just like lawn site and has alot of members.
  4. jbailey52

    jbailey52 LawnSite Bronze Member
    Messages: 1,095

    Patios I have an 04.. (but manufactured in 03... which really means it has issues an 03 would.. not 04.. which is actually good.. people dont realize that often..).. anyway. that buzzing, is a module for mine it had to have a recall and be put on... it circulated the oil after you turn the engine off.. Diesels if you drive for an extended amount of time, you are suppossed to leave the engine idle for 5 mins before shutting it off to let the oil get to the heads... ford added this so you dont have to do that now.
  5. PatiosInstalled

    PatiosInstalled LawnSite Member
    Messages: 114

    this buzzing is actually a new sound it just started a day or two ago and its in the fuel pump i believe. it buzzes the entire time i drive.
  6. jbailey52

    jbailey52 LawnSite Bronze Member
    Messages: 1,095

    Oh ok... well then deff something different.. You should hear the oil mod while driving so I dont think it is that...
  7. POPO4995

    POPO4995 LawnSite Bronze Member
    Messages: 1,208

    Well, you do have a '04 Powerstroke....:rolleyes: Just kidding, I know one of the fuel filters is mounted below the driver's seat on the frame rail but I wouldnt think that would buzz....??
  8. Idealtim

    Idealtim LawnSite Senior Member
    Messages: 939

    If the truck is off and you roll the ignition to on, the fuel pump should cycle for about two seconds then quit. If the buzz corresponds to this, fuel pump?
  9. PatiosInstalled

    PatiosInstalled LawnSite Member
    Messages: 114

    yeah that buzz that you get when you turn your key to start the truck is the same buzz that continues.
  10. CrystalCreek

    CrystalCreek LawnSite Bronze Member
    Messages: 1,805

    here is the real deal. The cylinder is a fuel filter water seperator heater. The buzzing is because the heating element is about to fail. The circuity of the truck keeps the unit pressureized after the truck shuts down, about 30 seconds. Get to the dealership. Its a B#%&h to replace yourself. If you loose the heating element, icing/gelling can occur in cold temps. This means the truck will not run. You will be stranded.

    ESOS is the old trade mark exxon used They still label their pumps with it.

    Thank god I traded my blood for Diesel Fuel:laugh:

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