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355 Noise At Startup

Discussion in '348/355' started by cbrody, Jun 27, 2007.

  1. cbrody

    cbrody Rookie

    Nov 1, 2003
    35
    Southampton, NY
    Full Name:
    Chris
    #1 cbrody, Jun 27, 2007
    Hey Guys,

    When cold and I start up my car, there is a noise that kind of sounds like a Jet Engine and goes away once the temperature starts coming up. It comes from the vacuum pump area (rear right of engine compartment).

    Do you guys have this noise too?

    Thanks,

    Chris
     

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  2. PKF355

    PKF355 Formula Junior

    Nov 12, 2003
    696
    sOCal
    Full Name:
    Patrick
    #2 PKF355, Jun 27, 2007
    It's normal. BTW, that jet engine sound is cool, right?

    It's secondary air injection for cold start to prevent mixture being too rich....I think. Need someone with better knowledge of emissions to confirm.
     
  3. gothspeed

    gothspeed F1 World Champ

    May 26, 2006
    10,244
    U.S.A.
    Full Name:
    goth
    #3 gothspeed, Jun 27, 2007
    You are correct!!!
     

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