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  1. #1
    Senior Member Two Rings a4_1.8t_01's Avatar
    Join Date
    Feb 24 2008
    AZ Member #
    25676
    My Garage
    A4 1.8TQM 01
    Location
    NY

    249N bypass question.

    I hear some guys bypass it. What are the advantages? And how would you do it? Thanks.
    Unitronic tuned. love it.

    Need any services done in NYC area please PM me. I will diagnose and fix your car. Also do clutch replacements, Timing-belt services, Turbo upgrade/installation, Fluid changes, boost leaks and pretty much anything.

  2. #2
    Veteran Member Four Rings Stampy's Avatar
    Join Date
    Oct 02 2007
    AZ Member #
    21533
    My Garage
    A6, A8, X5, etc
    Location
    Windy City

    Re: 249N bypass question.

    T the vacuum line from the front of the intake manifold. When you T it, one line goes to the DV and one to the N249. It tricks the N249 into thinking its still working, but the DV actually is running directly off the manifold. I noticed a little bit better response from my DV when I did it to mine.
    Village Idiot!!!

    (\__/)
    (='.'=)
    (")_(")

    lots of rings in my garage

  3. #3
    Senior Member Two Rings a4_1.8t_01's Avatar
    Join Date
    Feb 24 2008
    AZ Member #
    25676
    My Garage
    A4 1.8TQM 01
    Location
    NY

    Re: 249N bypass question.

    My DV is already running from the front of the manifold. Doesnt the N249 already have a line going to it? I dont know which one it is lol.
    Unitronic tuned. love it.

    Need any services done in NYC area please PM me. I will diagnose and fix your car. Also do clutch replacements, Timing-belt services, Turbo upgrade/installation, Fluid changes, boost leaks and pretty much anything.

  4. #4
    Veteran Member Four Rings Stampy's Avatar
    Join Date
    Oct 02 2007
    AZ Member #
    21533
    My Garage
    A6, A8, X5, etc
    Location
    Windy City

    Re: 249N bypass question.

    Well that is the line that is supposed to go to it. Perhaps someone T'd it off something else. As far as I know you can't remove these without a CEL. Only Bypass. Lots of info on this over on VWvortex in the 1.8t section. MkIV guys do it mucho.
    Village Idiot!!!

    (\__/)
    (='.'=)
    (")_(")

    lots of rings in my garage

  5. #5
    Senior Member Two Rings a4_1.8t_01's Avatar
    Join Date
    Feb 24 2008
    AZ Member #
    25676
    My Garage
    A4 1.8TQM 01
    Location
    NY

    Re: 249N bypass question.

    Alright thanks. I think mine is already bypassed but nothing is td off lol.
    Unitronic tuned. love it.

    Need any services done in NYC area please PM me. I will diagnose and fix your car. Also do clutch replacements, Timing-belt services, Turbo upgrade/installation, Fluid changes, boost leaks and pretty much anything.

  6. #6
    Senior Member Two Rings
    Join Date
    Dec 01 2006
    AZ Member #
    13830
    Location
    Santa Cruz, CA

    Re: 249N bypass question.

    its way easy to "remove." just plug your dv straight into the manifold then unplug the n249 and rig in a resistor. it tricks the ecu. i have been running mine like this for about a year with no issues.

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