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

rough idle

Discussion in 'A3/S3 Forum (8L Chassis)' started by s3matthewd, Mar 4, 2011.

  1. s3matthewd

    s3matthewd Member

    Joined:
    Jan 18, 2011
    Messages:
    79
    Likes Received:
    0
    hi could anyone tell me what the three way valve is that sits under the inlet manifold on the bam engine seem to have blown the end clean out of it on my car eml is now on guess its due to this fault
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. beachbuggy

    beachbuggy Well-Known Member

    Joined:
    Jan 27, 2010
    Messages:
    1,846
    Likes Received:
    164
    I guess you're talking about the PCV system? One end comes off the inlet manifold, other end goes into the oil cooler and the 3rd goes to the hockey puck? It's part of the vacuum system, which draws pressure from the cylinder head and oil cooler, removing fumes etc , basically the breather system for the engine. If this has a leak then it will almost certainly cause rough idle as extra air is drawn into the manifold, also if it's blown before a one way check valve then you'll have a big boost leak. Either fit a catch can setup, a silicone replacement or buy a new set of pipes from audi.
     
  4. s3matthewd

    s3matthewd Member

    Joined:
    Jan 18, 2011
    Messages:
    79
    Likes Received:
    0
    it actually blew the cap out of the one way valve would a new part fix this or would i be better going for a catch can setup
     

Share This Page