1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

My car whistles at me....

Discussion in 'A3/S3 Forum (8L Chassis)' started by Pete20vt, May 15, 2010.

  1. Pete20vt

    Pete20vt Supermoto Junkie

    Joined:
    Apr 14, 2010
    Messages:
    121
    Likes Received:
    0
    Since having the car mapped it whistles under load (4th or 5th), well its more like a quick sharp intake of air briefly at a certain boost level, it comes in very quick, and stops very quick too. Its not a spooling sound and it defo dosnt sound right, and i'm having a right nightmare finding it as it dosnt do it while stationary.

    I ran the car without an air filter and the whislte lastted longer so i'm thinking airbox/intake issue? Checked all the hoses and everything seems ok.

    Anyone else have this or know what it is?

    Only mods on the car are K&N panel and Custom-Code map.
     
  2. Advert Guest Advertisement


  3. voorhees

    voorhees Moderator
    Staff Member Moderator Black Edition Team Brill Red

    Joined:
    Dec 18, 2005
    Messages:
    16,075
    Likes Received:
    1,893
  4. Broken Byzan

    Broken Byzan Photographic Moderator
    Staff Member Moderator VCDS Map User quattro Audi A4

    Joined:
    Apr 26, 2004
    Messages:
    13,166
    Likes Received:
    452
    Its called Cavitation, if its the sound i think it is
     
  5. Pete20vt

    Pete20vt Supermoto Junkie

    Joined:
    Apr 14, 2010
    Messages:
    121
    Likes Received:
    0
    Don't know, why would the MAF make a noise?

    Care to elaborate?
     
  6. OllieH

    OllieH Member

    Joined:
    Aug 27, 2009
    Messages:
    368
    Likes Received:
    0
    Cavitation is turbulent air, where the turbo is trying to draw the air in quicker than the intake can supply it, so the airflow is no longer smooth, but becomes turbulent. Sounds abit like a squeel when the turbo is boosting up. Is quite normal for a remapped car.
     
  7. Pete20vt

    Pete20vt Supermoto Junkie

    Joined:
    Apr 14, 2010
    Messages:
    121
    Likes Received:
    0
    I see, i did try it briefly without an air filter at all (just an empty airbox) earlier though so there should have been plenty of air supplied to the turbo?
     
  8. Y83OLK

    Y83OLK Hulk Smash!

    Joined:
    Sep 6, 2009
    Messages:
    841
    Likes Received:
    5
    Cavitation can only occur in liquid though.

    Its commonly heard if you run you pas fluid low etc.
     
  9. Pete20vt

    Pete20vt Supermoto Junkie

    Joined:
    Apr 14, 2010
    Messages:
    121
    Likes Received:
    0
    Hmm, will check my fluid then :)
     
  10. Y83OLK

    Y83OLK Hulk Smash!

    Joined:
    Sep 6, 2009
    Messages:
    841
    Likes Received:
    5
    I doubt fluid will cause your whistle though mate..
    Cavitations air bubbles in fluid, sounds like sucking pea's through a hose pipe.

    If youve recently had the remap... That'll be the sound you hear.
    4-5th on a hill or under load., Sound like darth vader breathing through a bean can???
    If so, its just air turbulence. nothing to worry about.
     
  11. Pete20vt

    Pete20vt Supermoto Junkie

    Joined:
    Apr 14, 2010
    Messages:
    121
    Likes Received:
    0
    Its just nothing i've heard before on a 1.8T, just seems a little odd.
     

Share This Page