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PowerStroke noise

Discussion in 'Ford Trucks' started by MickiRig1, Dec 15, 2004.

  1. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    What causes the "Jake Brake" kind of noise at low speeds in a PowerStroke?
    It's a 96 E-350 Squad, I was just wondering what causes it, a few of our units do it. The mechanics wait till it dies to figure it out.
  2. Crumm

    Crumm Senior Member
    Messages: 529

    Not sure what you mean by "Jake brake sound" but if you are hearing a flutter it might be the EBPV closing. It closes when the engine is cold to aid in warming up. Once the engine oil is up to operating temperature it will not close anymore. It does not close under acceleration or at high rpm either. It makes more of a whooshing sound than a "Jake" type clatter.
  3. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    The sound is like the exhaust brake on tractor trailers---> Jake Brake, not as high pitched but the same kind of growl.
    They do it when they are warm,when it shifts into low gear while rolling up to a stop or low speed crawl up a hill.
  4. Snow Encrusted

    Snow Encrusted Member
    Messages: 66

    Its probably just engine breaking, when the tranny down shifts you get some degree of engine breaking,rpms kick up do to lower gear??????????
  5. neversatisfied

    neversatisfied Member
    from ct
    Messages: 73

    its the torque converter locking and unlocking.95-97's trucks will be a little different depending on the flash the computer has.

    MOW ME OVER Senior Member
    Messages: 209