Heavy vibration when I turn on engine brake

Discussion in 'Ask An Owner Operator' started by Moephilly1, Jan 12, 2019.

  1. Moephilly1

    Moephilly1 Light Load Member

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    hey guys I have a 2007 w900 with cat 15, when I turn on engine brake The whole truck and engine starts to vibrate heavy and the check engine light comes on sometime but goes fast I can’t figure out the flash code. Any thoughts? Thanks
     
    Dale thompson Thanks this.
  2. Snakeschasingcars

    Snakeschasingcars Medium Load Member

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  3. D.Tibbitt

    D.Tibbitt Road Train Member

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    Thats ur truck sayin "quit slowin me down driver!!!"
     
  4. Zeviander

    Zeviander Road Train Member

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    VV-heads? Chances are they are busted, crack the valve covers and check.
     
    Moephilly1 Thanks this.
  5. supersnackbar

    supersnackbar Road Train Member

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    I'm not familiar with CAT's, but if it has selector switch for low/med/high, see if it does it on each position. It'll help identify which cylinder(s) are the problem.
     
    Tombstone69, 22dragoo and Moephilly1 Thank this.
  6. Largecar359

    Largecar359 Heavy Load Member

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    STAY OFF THE JAKE. Until you can take a peak into the rocker boxes. When is the last time you ran the Rack on your motor? If it has been awhile then you got one or two out of adjustment. If Trk is shuttering bad then do valve adjustment and re-bush jakes. Check number 3-4 cylinder first, they usually go before others. You’ll be fine as long as you don’t keep riding around singing the jake. Also check springs, a busted jake spring will cause vibration. Problem will reveal itself as soon as you look in the rocker boxes.
     
    Moephilly1 Thanks this.
  7. Moephilly1

    Moephilly1 Light Load Member

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    I turn it on once a week, I’m not the type of driver who has it on 24/7
     
    D.Tibbitt Thanks this.
  8. Moephilly1

    Moephilly1 Light Load Member

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    I dont usually use it it’s once in a blue when I really need it. I recently bought the truck so I’m not sure about that. I’ll take it to a shop Monday to check that out that’s for your help
     
  9. Moephilly1

    Moephilly1 Light Load Member

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    Will do thanks for the help
     
  10. Moephilly1

    Moephilly1 Light Load Member

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    It does it on all positions
     
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