f350 diesel running sluggish

Discussion in 'Mechanic and Repair' started by Kings of Green LLC, Feb 27, 2013.

  1. Kings of Green LLC

    Kings of Green LLC LawnSite Member
    Messages: 146

    Im new to diesel' s so not sure where to start with trouble shooting. I have a 2001 f350 1ton with a 7.3 and the last few weeks it has been running very sluggish.I use fuel treatment for cold weather. It has a five speed manual and I rarely get out of fourth gear. Any ideas on what's going on? Thanks
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  2. 290

    290 LawnSite Member
    Messages: 216

    Head over to http://www.ford-trucks.com/ and post your question there. Not saying nobody here can help you but its kind of what they do over there.
  3. jones68

    jones68 LawnSite Senior Member
    Messages: 453

    when was the last time you changed your fuel filter? hopefully just a clogged filter a cheap and easy fix
  4. Landrus2

    Landrus2 LawnSite Fanatic
    Messages: 5,050

    Clean oil is a must on these engines the fuel system is driven by oil dirty oil slow injector.:waving:
  5. Sprinkler Buddy

    Sprinkler Buddy LawnSite Bronze Member
    from Florida
    Messages: 1,185

    This is often the culprit, defiantly do this first.
  6. KrayzKajun

    KrayzKajun LawnSite Fanatic
    Messages: 10,737

    Change all your filters.
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  7. Oldtimer

    Oldtimer LawnSite Bronze Member
    Messages: 1,459

    Don't use cheap filters. Pay the price & get OEM filters.

  8. nickslawnltd

    nickslawnltd LawnSite Member
    Messages: 169

    Filters and oil first its the easiest and least costly. Is it running rough and low on power? If so it could possibly be an injector. You can always get a shop or a buddy if you have one that has a fancy scanner and they can do a buzz test on the injectors to see if one is getting weak or shot all together
  9. blazemaeko

    blazemaeko LawnSite Member
    Messages: 11

    If not fuel filter, they are known to have injector plugs to come loose. The newer motors have a problem with o-rings leaking with the HPOP.
  10. Valk

    Valk LawnSite Silver Member
    Messages: 2,760

    How many miles? Turbo gone bad?

    My '96 turbo Eclipse had a bad electric idle motor that controlled a butterfly (choke??) in the intake. Talk about sluggish - it misbehaved at all speeds turning my sportscar into a non-turbo-spooling turd. Just before I got it fixed a young lady on her cellphone ran a redlight and t-boned/totaled it. :cry:

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