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

Anyone got any ideas why my car is 'pulsing'?

Discussion in 'A3/S3 Forum (8L Chassis)' started by slowcoach3, Jun 9, 2013.

  1. slowcoach3
    Offline

    slowcoach3 Active Member

    Joined:
    Sep 22, 2010
    Messages:
    780
    Likes Received:
    93
    [Jun 9, 2013]
    When I'm cruising along the car feels like its got a slightly irregular, pulsing heartbeat! Feels very strange and not very nice, on boost it seems ok still boosting to 24psi and holding -24 on vac. Theres no codes on vcds and I very recently changed the fuel filter to see if that caused it. Any ideas welcome!
    #1
  2. 16Klappe
    Offline

    16Klappe I <3 Panda's! Supporter

    Joined:
    Sep 16, 2008
    Messages:
    5,776
    Likes Received:
    1,143
    [Jun 9, 2013]
    Boooooooooost leaks, weak actuator, split DV, usual things.

    24psi is too much, over boosting. I thought it had just been mapped?
    #2
  3. slowcoach3
    Offline

    slowcoach3 Active Member

    Joined:
    Sep 22, 2010
    Messages:
    780
    Likes Received:
    93
    [Jun 9, 2013]
    No boost leaks, all good in the hood. 24Psi has been ok for 18 months now, its been suggested my fuel pump is dying, is there any reliable tests for this?
    #3
  4. 16Klappe
    Offline

    16Klappe I <3 Panda's! Supporter

    Joined:
    Sep 16, 2008
    Messages:
    5,776
    Likes Received:
    1,143
    [Jun 9, 2013]
    Your fuel pump is probably dieting from trying to supply 24psi haha.

    Check the duty cycle, phil can do it.
    #4
  5. Westy
    Offline

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,358
    Likes Received:
    1,005
    [Jun 9, 2013]
    Jardo is right though, 24psi is a bit high for a K04. They just tend to produce loads more heat then anything over 21ish. I'd suggest getting a new fuel pump if you know it's dieing. Are you running stock injectors and a 3 bar FPR?
    #5
  6. slowcoach3
    Offline

    slowcoach3 Active Member

    Joined:
    Sep 22, 2010
    Messages:
    780
    Likes Received:
    93
    [Jun 10, 2013]
    Revo baby, all about boost! Yeah its not ideal,keep finding things to fix before going to rtech though. Its on a standard 3bar fpr, i wouldn't let anybody put a 4 bar fpr on my car. Anything else that could cause this before I go and buy a new pump?
    #6

Share This Page