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Air release/air hissing sound when changing gears. Help?

Discussion in 'Experienced Truckers' Advice' started by Dave2014, Sep 22, 2014.

  1. Sep 22, 2014 #1
    Dave2014

    Dave2014 Bobtail Member

    24
    1
    Jan 20, 2014
    0
    I have a 2007 volvo 780 cummins engine. I've noticed an air hissing sound when I take my foot off the gas or in between gear changes as I try to pick up speed all the way up to 5th gear change. Has anyone had this problem? If someone could give me insight on this, that would be very helpful.

    Thank you,

    Dave
     
    Dave2014, Sep 22, 2014
    Dave2014, Sep 22, 2014
    #1
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  3. Sep 22, 2014 #2
    wonderdog24

    wonderdog24 Medium Load Member

    377
    127
    Mar 1, 2012
    Puyallup,Wa
    0
    Check the hose from your compressor to your intake manifold...... Looks like a water hose
     
    wonderdog24, Sep 22, 2014
    wonderdog24, Sep 22, 2014
    #2
  4. Sep 22, 2014 #3
    xsetra

    xsetra Road Train Member

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    Aug 21, 2011
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    Is it coming from your shift knob. Lot of possibilities. Any of your connections could be the source,
     
    xsetra, Sep 22, 2014
    xsetra, Sep 22, 2014
    #3
  5. Sep 22, 2014 #4
    tsavory

    tsavory Road Train Member

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    Jun 4, 2013
    Paoli, IN
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    Hearing it with the window up, down or both?
    Hear it at all while stopped? With splitter in either postion?
    Also check exhaust for leaks could be hearing the turbo down spooling since its between shifts or letting up.
     
    tsavory, Sep 22, 2014
    tsavory, Sep 22, 2014
    #4
  7. Sep 22, 2014 #5
    CrappieJunkie

    CrappieJunkie Wishin' I was fishin'

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    In a van down by the River.
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    Bet your splitter is in the middle. Mine does that time to time. If in high gears take it up more and bet it goes away.
     
    CrappieJunkie, Sep 22, 2014
    CrappieJunkie, Sep 22, 2014
    #5
  8. Sep 23, 2014 #6
    rbrtwbstr

    rbrtwbstr Road Train Member

    3,210
    7,112
    Jul 11, 2012
    in the bush somewhere
    0
    Could be the cab suspension leaking off excess air, especially if you get'er rocking
     
    rbrtwbstr, Sep 23, 2014
    rbrtwbstr, Sep 23, 2014
    #6
  9. Sep 23, 2014 #7
    PackRatTDI

    PackRatTDI Licensed to Ill

    14,765
    22,561
    Jul 15, 2006
    El Chuco, Tejas
    0
    I had a similar noise with the D13. Turned out that one of the EGR tube clamps broke, letting exhaust leak out.
     
    PackRatTDI, Sep 23, 2014
    PackRatTDI, Sep 23, 2014
    #7
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