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  1. #1
    Bobtail Member
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    387 engine brake

    I just bought an 05 387 when I use the engine brake it vibrates the entire truck and doesn't seem to be working at its full potiental


  2. #2
    Road Train Member 123456's Avatar
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    hemi, or V-8 ......?

  3. #3
    Bobtail Member
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    Neither it's an ISX Cummins

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  5. #4
    The Legend CondoCruiser's Avatar
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    If it's vibrating, possibly one of the cam solenoids is bad. Time to go to the shop!

    Does it make any difference changing the stages?

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  7. #5
    Bobtail Member
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    No it does not change anything

  8. #6
    Road Train Member
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    if changing the stages does not make a difference, it might be time to look at engine mounts too, or it could be in the cylinders that come on at the lowest setting, and are also on at all the higher ones too.

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