Monster MotorsportAH Fabrications
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  1. #1
    Bigandbald's Avatar
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    MOT failure on emmissions??? Help

    Ok so my standard 111,000 mile S3 just failed the MOT on Emmissions. the MOT tester said it was the Lambda sensor but before i go and buy one i just want to make sure it is that and not something else??

    Anyone got any ideas??

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    `02 S3 AMK now sold, need more doors so along comes an '04 Seat LCR Bam 225, badger5 tip, s2000 filter, very high mileage now with badger5 remap @ 275.5bhp.

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  3. #2
    superkarl's Avatar
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    thrash it and try again

  4. #3
    <tuffty/>'s Avatar
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    AFR is at 0.96 from that printout.. you would need to check blocks 032, 031 and 001 initially to see what the ECU thinks is happening...

    Also check for fault codes... adaption may not be working for some reason... this normally happens if the N249 or post cat lambda is disconnected...

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  5. #4
    "Stick a V8 in it!"

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    There could be multiple issues, have you checked for fault codes?

    First Fast idle test to me looks like the cat isnt working. The Lambda and HC reading is fine, but CO is typical of a decatted car.

    Second fast idle test has gone quite rich, which could mean an airleak, faulty lambda, duff MAF or various other issues.

    Natural idle again looks like the cat isnt working.


    With a working cat, CO is typically almost 0.

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  6. #5
    Bigandbald's Avatar
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    Tuffty...you appear to be the VCDS God here, unfortunately i dont have it and have posted on here before asking for help and no one responded??? happy to pay for someone's time to plug it in and diagnose.

    i had thought about maybe an additive in the fuel or something???
    `02 S3 AMK now sold, need more doors so along comes an '04 Seat LCR Bam 225, badger5 tip, s2000 filter, very high mileage now with badger5 remap @ 275.5bhp.

  7. #6
    <tuffty/>'s Avatar
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    As Aragorn said... could be one of a few things... VCDS or at the very least a generic code reader required really to see if the ECU is unhappy...

    Check for split pipes under the inlet manifold... clue will be oil... oil should be in the engine not on the outside... if its outside then its leaked from somewhere...

    If the garage you had the MOT at has a smoke tester it would be a good idea to get that done as this should highlight split pipes more easily

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  8. #7
    jamiebennett81's Avatar
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    OR

    Take it to a very friendly MOT tester.....
    2001 Seat Leon Cupra. 291bhp 13.4 1/4 mile @ 108mph.

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  9. #8
    "Stick a V8 in it!"

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    OR

    Dont, and fix the issues so the engine is actually running properly.

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  10. #9
    Bigandbald's Avatar
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    Quote Originally Posted by aragorn View Post
    OR

    Dont, and fix the issues so the engine is actually running properly.
    MO was jut going to say I can get it through the MOT that's not the problem, but I'm all up for fixing it as my MPG is shocking at best so happy to resolve the issue(s) but need it diagnosed.

    anyone know anyone near Basingstoke with vagcom that wants to earn some beer tokens???
    `02 S3 AMK now sold, need more doors so along comes an '04 Seat LCR Bam 225, badger5 tip, s2000 filter, very high mileage now with badger5 remap @ 275.5bhp.

  11. #10
    jamiebennett81's Avatar
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    Quote Originally Posted by Bigandbald View Post
    MO was jut going to say I can get it through the MOT that's not the problem, but I'm all up for fixing it as my MPG is shocking at best so happy to resolve the issue(s) but need it diagnosed.

    anyone know anyone near Basingstoke with vagcom that wants to earn some beer tokens???
    Prawn can help as he is in Basingstoke or I can as I'm Reading based
    2001 Seat Leon Cupra. 291bhp 13.4 1/4 mile @ 108mph.

    Click the picture below for my build thread.


  12. #11
    Bigandbald's Avatar
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    Ill try to get hold of Prawn, if not ill pop you a pm if thats ok.

    many thanks peeps!!!
    `02 S3 AMK now sold, need more doors so along comes an '04 Seat LCR Bam 225, badger5 tip, s2000 filter, very high mileage now with badger5 remap @ 275.5bhp.

  13. #12
    Bigandbald's Avatar
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    PRAWN............HELP!!!!!!!!
    `02 S3 AMK now sold, need more doors so along comes an '04 Seat LCR Bam 225, badger5 tip, s2000 filter, very high mileage now with badger5 remap @ 275.5bhp.

 

 

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