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Thread: Vacuum leak somewhere

  1. #1
    Join Date
    Aug 2008
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    SYDNEY
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    Vacuum leak somewhere

    Hi all,

    Last weekend I changed the timing chain on my 2005 mkv golf gti. After I installed the new chain and tensioner and put everything back together the car idles like crap..... It drives absolutely fine but isn't idling smoothly until about 1200rpm. The computer is making it idle high.

    I have tripple checked everything and all the hoses are connected.

    My Ross tech spat out the p2279 code - leak in air system.

    What's the best way to figure out where the leak is? As it doesn't appear to be anything obvious. I assume its coming from something I touched as it was fine before. I didn't touch the front pcv so don't think that's the culprit.

    Cheers

    Sent from my Nexus 5 using Tapatalk
    2008 POLO GTI - SOLD
    2005 MkV Golf GTI - couldn't resist

  2. #2
    Join Date
    May 2005
    Location
    Melbourne, Mexico
    Posts
    8,994
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    Look at fuel trim, block 032 what's that saying? Throttle body alignment if you had the battery disconnected.

  3. #3
    Join Date
    Apr 2006
    Location
    VW Race HQ - Sydney
    Posts
    1,219
    Users Country Flag

    You'll probably need a new PCV

    Pressure Control Valve (PCV) - Euro Revolution


    Car automatically does throttle body alignment when the key is removed from the ignition if the battery voltage is sufficient
    Bug_racer supports the rebellion of the euro revolution

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