any diesel tech do gooders here?

Discussion in 'Trucks and Trailers' started by greenleaflandpest, Mar 12, 2014.

  1. greenleaflandpest

    greenleaflandpest LawnSite Member
    Posts: 14

    Recently bought a 2003 f350 dump with a 6.0. has 40,000 miles on it. had about a 240 mile drive home from where i bought it and noticed if I had to go up any steep hills or get on the gas..once the rpms go up usually over 2,000 the turbo sounds like the engine has a rev limiter on it. "Figures"(rolling eyes) Truck sounds great at idle, no smoke, no check engine notices either. seems like turbo is releasing pressure and not holding boost. Im no diesel tech, any ideas fellas? THAnks!
  2. tnmtn

    tnmtn LawnSite Bronze Member
    from NE Tn.
    Posts: 1,019

    i'm not a technician, but can suggest you check out go to a subforum four engine and ask away. you should get some good responses there. good luck,
  3. Barnabas

    Barnabas LawnSite Member
    Posts: 117


    Dont get addicted to modding if you stop in there ;)
  4. greenleaflandpest

    greenleaflandpest LawnSite Member
    Posts: 14

    Hey Thanks, I do have the same question going in another forum for diesels, just figured to throw it on here if anyone had another opinion.

    CLARK LAWN LawnSite Silver Member
    Posts: 2,526

    Need to be specific. Are you actually loosing boost or are you just cruising and don't need the boost?
    Posted via Mobile Device
  6. Mark13

    Mark13 LawnSite Member
    Posts: 173

    The computer in the 6.0's can make them idle smooth even with some fairly significant problems. You'll hear one idling and all seems well until you hear it drive way or under heavy throttle and you can tell something isn't right.

    Where are you located?
  7. greenleaflandpest

    greenleaflandpest LawnSite Member
    Posts: 14

    the turbo spools all the time at low rpm but it would start to spool and release on and off when I was going up any steep hills or stepped on the gas, what I hear is normally when you get on the gas and let go the turbo releases the pressure like it is suppose to. what is happening is the turbo revs up and spools releases spools release etc etc like a go cart with a rev limiter on it. it doesn't keep spooling to hold pressure and power unless you let off the gas
  8. dieselss

    dieselss LawnSite Bronze Member
    Posts: 1,661

    Could be the turbo or the waste gate.
    Posted via Mobile Device
  9. Monroe74

    Monroe74 LawnSite Senior Member
    Posts: 322

    I had it happen to mine the exhaust to the turbo maybe loose or not mated up properly.
  10. tcm5483

    tcm5483 LawnSite Member
    Posts: 23

    Look at all your turbo boots going from your turbo to the intercooler they are bad to get oil soaked and get weak a bust. Have had this happen a lot and like Monre74 said . it could be the downpipe coming off the turbo or could be leaking around the y pipe that feeds the turbo from manifolds .

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