1999 S80 hissing noise when pressing gas pedal

Discussion in 'Volvo S80' started by kompir, Dec 25, 2006.

  1. kompir

    kompir Guest

    1999 Volvo S80

    There is a hissing noise when I press the gas pedal. It gets quieter
    when I don’t, louder when I press harder. It also gets louder the
    longer I drive. Sounds like a soft hiss, and then turns out into
    something like scratching of sand on glass.

    Anyone has an idea what it could be? It’s not there when the engine is
    cold, so the service guys didn’t hear it (they didn’t test-drive it
    long enough).

    I’d really appreciate the help.

    Last post for today. Merry Christmas everyone and goodnight.
     
    kompir, Dec 25, 2006
    #1
  2. kompir

    ~^ beancounter ~^ Guest

    you might want to check for turbo or vacume leaks...
    hissing might be the air by passing through a hole
    or leake...has miles per gallon changed?
     
    ~^ beancounter ~^, Dec 25, 2006
    #2
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