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Thread: 2.0 FSI Poor idle when cold

  1. #181
    Join Date
    Mar 2009
    Location
    Goulburn NSW
    Posts
    184
    Thread Starter

    At the moment Iíve listed the car for sale $1000 complete Iíll post a link later today if that doesnít work out Ill look at parting it out.

    What are you after?

  2. #182
    Join Date
    Jun 2011
    Location
    Newcastle
    Posts
    2,917
    Quote Originally Posted by saabman View Post
    At the moment Iíve listed the car for sale $1000 complete Iíll post a link later today if that doesnít work out Ill look at parting it out.

    What are you after?
    Manual or DSG?


    Sent from my iPhone using Tapatalk

  3. #183
    Join Date
    Mar 2009
    Location
    Goulburn NSW
    Posts
    184
    Thread Starter
    6 Speed manual

  4. #184
    Join Date
    Jul 2007
    Location
    Brissy
    Posts
    2,197
    Users Country Flag
    I just need a door skin bolt, a dust cover to the caliper guide pin. and maybe an EGR if it is know to be good.
    MK4 GTI - Sold
    MK5 Jetta Turbo - Sold
    MK5 Jetta 2.Slow - Until it dies.

  5. #185
    I've purchased MK5 2005 (90K on the clock) with the similar problem, rough idle on cold start for about 1m or less then again a few hrs later same issue. Some of you may have already tried this or commented regarding possible fix. There is a vacuum line that runs from the interconnecting hose between air box and MAF to the brake booster, this is prone to cracking and leak at any of the 6 connection points.
    Resolution : I did a quick cheap test and fix by replacing the plastic OEM hose with a fuel hose (rubber) which has a firm wall and can withhold the vacuum suction. Please note when replacing the OEM hose you need to use the inline none return valve, it worth while testing that as well. It needs to be installed the same way it came out, directional. If installed in the wrong direction you will have very poor brakes with no booster.
    My idle problem has since been resolved by replacing the complete pipe.
    New part is pricey from dealer and 2nd part has chance of failure due to nature of the plastic.

    I hope this is of help.
    Last edited by Rogly55; 02-11-2023 at 05:11 AM.

  6. #186
    Join Date
    May 2013
    Location
    Sydney Australia
    Posts
    4
    Users Country Flag
    I noticed using premium fuel from shell fixed a lot of this, these FSI motors actually had the two modes, one of which was disabled at the dealers when new, they are only using homogoneous mode not stratified mode that they were marketed with.

  7. #187
    Join Date
    Jul 2007
    Location
    Brissy
    Posts
    2,197
    Users Country Flag

    I think the NA motors had the stratified mode, but the turbo engines were all homogeneous injection
    MK4 GTI - Sold
    MK5 Jetta Turbo - Sold
    MK5 Jetta 2.Slow - Until it dies.

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