Torque Cars

2001 1.8t

Discussion in 'Bora/Jetta' started by bergman, 31 January 2011.

  1. bergman

    bergman Newbie

    Messages:
    2
    From:
    usa
    Car:
    1.8t
    alright I have a 2001 1.8t and im having problems with it. the car was running with a huge loss of power and i am un able to figure out what the problem is. im getting a boost preasure loss code and a random missfire code. I replaced the n75 and the deverter valve thinking that was the problem, with no change I pulled the turbo thinking that was going to be my problem but that wasent eather. so with that said im kinda stuck. also im thinking if I have the car pulled apart this far maby i should do some minor upgrades the car witch has 100thousand plus mi. so im going to change out the turbo anyways even tho it is in working cond. any help would be greatly apreated, thanks
     
  2. turbonutter69

    turbonutter69 TC ModFather Moderator

    Messages:
    18,967
    From:
    Alone in the dark.
    Car:
    Insignia SRI.
    Hello and Welcome to Torquecars.:bigsmile:
    Hope you enjoy your time with us.
     
  3. T9 man

    T9 man TC Pro Founder Moderator

    Messages:
    20,369
    From:
    London, UK
    Car:
    Saab 9-3SS T9
    Greetings and Welcome! ;)
     
  4. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,306
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    It is probably just a split or loose hose. Can you hear rushing air? Get someone to rev it gently whilst you are looking under the bonnet.

    Atmospheric dump valves can cause this issue but the diverter shouldn't as it doesn't lose any air.

    Next up check the coil packs and plugs. Removing the plugs one at a time will hopefully show up any firing faults on one cylinder.

    Has the car been modified? (Remapped, induction kit, de catted etc...)
     
  5. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,306
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    Oh and re turbos, fit the newer KO3s, a Hybrid turbo or the KO4 if you want bigger power (you'll need a remap and the KO4 is not a straight swap).
     
  6. bergman

    bergman Newbie

    Messages:
    2
    From:
    usa
    Car:
    1.8t
  7. pgarner

    pgarner TC ModFather Moderator

    Messages:
    16,521
    From:
    Lockerbie, SW Scotland
    Car:
    Octy smoke machine
    hey and welcome to the site.

    split vac line would be my guess. theres a couple of culprit ones
    Y line on the right hand side of the engine
    long breather pipe under the intake manifold. thats the main 2


    edit if the current turbos fine dont do anything else until you have the engine running properly
     
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