JMB RetrofitsSky Insurance
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  1. #1
    texas_venom316's Avatar
    Reverse Gear

    Join Date
    Apr 2008


    Hey guys im new here, hope ur all cool. Let me begin by telling the story. I purchased this s3 as a cat c as a little project to see if i can get it roadworthy again and then perhaps keep it for myself. Now i am not a mechanic but i can do intermediate things so all the main stuff i take to my local mechanic.
    When i bought this car the exhaust system was missing from the downpipe onwards , so i ordered a new one and had it fitted without a cat, so basically had a decat pipe made from the 2 piece into the one. I then had the standard s3 backcox cut off and had a perfromance one added.
    Now as for the engine ..... i have discovered the car has a backdraft turbo upgrade so i called them up and am in the process of arranging a booking with them, however its quite far from me so ill need to drive it down, but before i can do that i need to make it driveable!!
    So when i bought it this lambda sensor (next to turbo) was fried and not even connected which i thought was the reason the car is running so rich and also i changed the Mass airflow sensor which i thought would fix the dodgey idling problem ( doesnt idle still and fluctuates). the car also stalls if you rev it at high revs and then come t o stand still i.e traffic lights . So after installing these 2 parts it appears that now i cnt even drive over 2000 rpm with the car jerking like crazy. I have attached a video and pics so i can show you guys what its like. I have a friend who works for auid but they wont touch it because its been modified. I also have a friend who has the computer software for audi so im going to connect it up and get some error codes. But guys i simply want to make it driveable so i can take it down to backdraft so any advoce would really be appreciated. Before the lambda was not connected it was also drinking petrol like any man business.

    new lambda sensor bought froim and all it says is to fit audi a3 quat. But the connector fits and i gave them my reg number for them to match it.

    I also managed to order a wrong sensor and now they wont take it back, which is a bosch lambda sensor 0258007097, so if anyone wants it , let me no/


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  3. #2
    Staz's Avatar
    is a retronaut

    Join Date
    Oct 2006
    Bristol (mostly)
    I'd start by posting in the A3 8L section mate. They can probably help more.

    My advice would be put everything back to standard before you start to mod it. Then you know everything is fine in the first place.
    8P2 S3

    For advice on Air Con problems please read my FAQs.
    To find ASN members with VCDS check out the MAP.

  4. #3
    2nd Gear

    Join Date
    Aug 2007
    I agree with Staz, and without its cat it'll never pass another MOT test in its life.
    A3 2.0TDI Sportback S Line 184 Quattro S-Tronic, Mar. 2014 Glacier white. Electric seats, sunroof, se suspension, heated folding mirrors, Reversing camera, Nappa leather, TPMS, Hold assist, Xenon plus adaptive lights with variable active range control, lane assist, Interior light pack, Technology pack, Comfort pack with ACC, park assist & parking system plus



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