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

Symptoms of a faulty PCV valve?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by jk_s3, Feb 24, 2013.

  1. jk_s3
    Offline

    jk_s3 Member

    Joined:
    Mar 13, 2011
    Messages:
    91
    Likes Received:
    0
    [Feb 24, 2013]
    What are the symptoms of a faulty pcv valve?

    my car has a slightly lumpy idle and low power/no boost until 4500rpm, could this be down to a faulty pcv valve??
    #1
  2. Ads

    Ads

    [Nov 29, 2014]

  3. MrLapou
    Offline

    MrLapou Well-Known Member

    Joined:
    Jan 3, 2004
    Messages:
    1,232
    Likes Received:
    119
    [Feb 24, 2013]
    Instead of going on a hunch...try a diagnostic scan first.
    #2
  4. jk_s3
    Offline

    jk_s3 Member

    Joined:
    Mar 13, 2011
    Messages:
    91
    Likes Received:
    0
    [Feb 24, 2013]
    It's more of an educated guess than a hunch. Ill do a scan tomorrow. What fault codes you expect to see?
    #3
  5. Ads
    Offline

    Ads License to drive

    Joined:
    Jul 15, 2009
    Messages:
    8,222
    Likes Received:
    581
    [Feb 24, 2013]
    Signs are usually poor idle when the car is at normal running temperature... i.e. revs keep going from normal idle up to about 2k rpm and then dropping again. Also try removing your oil cap when engine is warm and if you can't get the cap off or there is a lot of suction then your pcv is more than likely knackered.
    #4

Share This Page