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Weird Hissing sound coming from engine

Discussion in 'General Automotive' started by awoit, May 18, 2009.

  1. awoit

    awoit [OP] Well-Known Member

    Joined:
    Nov 28, 2007
    Member:
    #3639
    Messages:
    378
    Gender:
    Male
    San Jose, CA
    Vehicle:
    08 TRD, SR5, Debadged
    URD CAI, Flowmaster super 40, Debadged, 15% Tint all around, 12" sub, amp, and upgraded kenwood headunit,
    Alright well i have a 455 Olds in my jetboat and whenever i get it up near its highest rpms after punching it a little bit theres a little hissing sound that is coming somewhere from the engine and it only does it for a second and then goes away once i let it off. I was thinking mayb this could be the alternater belt? but its not loose or anything so i need some feedback yo :cool:
     
  2. awoit

    awoit [OP] Well-Known Member

    Joined:
    Nov 28, 2007
    Member:
    #3639
    Messages:
    378
    Gender:
    Male
    San Jose, CA
    Vehicle:
    08 TRD, SR5, Debadged
    URD CAI, Flowmaster super 40, Debadged, 15% Tint all around, 12" sub, amp, and upgraded kenwood headunit,
    bumpz0r
     
  3. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
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    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Vaccume leak?
     
  4. OU812

    OU812 ban the term murdered out

    Joined:
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    First Name:
    danusa
    Kilroy was here
    Vehicle:
    06 PreRunner DblCab LB
    Nothing yet, brand new!
    What carb?? Q-Jet, Holley??
    Q-Jet -- secondaries taking time to close down can cause the hissing sound.
     
  5. awoit

    awoit [OP] Well-Known Member

    Joined:
    Nov 28, 2007
    Member:
    #3639
    Messages:
    378
    Gender:
    Male
    San Jose, CA
    Vehicle:
    08 TRD, SR5, Debadged
    URD CAI, Flowmaster super 40, Debadged, 15% Tint all around, 12" sub, amp, and upgraded kenwood headunit,
    its a holley
     
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