News

Identify a noise (actually a buzzing).....

Discussion in '308/328' started by Easyrider7467, Jun 22, 2009.

  1. Easyrider7467

    Easyrider7467 Formula Junior

    Nov 3, 2005
    968
    Northen N.J.
    Full Name:
    John
    The other day I was wiping down the motor, etc and beneath the airbox I heard a "buzzing" sound. I had nothing running or on. Just doing some light wiping of the bay, etc.

    Then on a different day I had the car running for a bit, approx 5 min while reinstalling my pass seat. When I turned the car off I heard the same "buzzing" sound, again coming from the area of the airbox. Its intermittent, a short burst of this buzz for approx 1-2 seconds then stops and will resound a few minutes later. This goes buzz sounds for approx. 3 - 4 times then stops completely.

    What is this......?
     
  2. To remove this ad click here.

  3. st@ven

    st@ven F1 Rookie
    Silver Subscribed

    Aug 4, 2008
    3,061
    Netherlands
    Full Name:
    Steven
    the sound of relief of fuelpressure?
     
  4. FF8929

    FF8929 Formula Junior

    Apr 12, 2008
    799
    Livonia, Michigan
    Full Name:
    Fred Flynn
    +1.
     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    20,279
    Texas
    Full Name:
    Steve Magnusson
    Another system that can make some unusual noises after engine shutoff is the fuel vapor recovery system (if yours is a US version 328). Easy to investigate -- just unscrew the fuel filler cap and see if that has any effect on the noise.
     
  6. t3thomas

    t3thomas Formula Junior

    May 9, 2008
    427
    North Carolina
    Full Name:
    GThomas
    Mud dauber building a nest under the airbox?
     
  7. To remove this ad click here.

  8. rolindsay

    rolindsay Formula 3

    Jul 14, 2006
    1,022
    Houston, TX
    Full Name:
    Rick Lindsay
    This is an aside but: I really like the sounds the 308/Mondial fuel system makes when the ignition is first turned on. Relays click, the pump starts, the accumulator makes a little "I'm full" sound and the 'Saturn IVb' is ready to launch. Yummy. :) -rick
     
  9. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    20,279
    Texas
    Full Name:
    Steve Magnusson
    Is your safety switch unplugged or broken (or some other modifications)? On the stock F K-Jet systems, the fuel pump should not run if the key is "on", but the engine isn't actually drawing air thru the airflow metering device.
     
  10. rolindsay

    rolindsay Formula 3

    Jul 14, 2006
    1,022
    Houston, TX
    Full Name:
    Rick Lindsay
    Yep, its buggered. Part of the 'federalizing' that was done in 1983, and not yet un-done by me. BTW, it will, however, time out. Humm...
     
  11. Easyrider7467

    Easyrider7467 Formula Junior

    Nov 3, 2005
    968
    Northen N.J.
    Full Name:
    John

    Thanks.
     
  12. To remove this ad click here.

Share This Page