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  1. #1
    audi-a6's Avatar
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    Exhaust smell inside car

    So, an a6 2.7t (posting here as similar engine to s4 and get more response) so as title says, just lately I've notice a strong smell of exhaust gasses inside car, but only when I put my foot down and on boost, if just pooling along at any speed at any rev it's fine, no smell at all, but as soon as on boost, it stinks inside car, I've checked under car, no exhaust blowing or any thing like that, any ideas?

    i might have lost a bot of power as well, as don't seem as torquey as it was but might just be I've got so used to the car
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  3. #2
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    Has the Pollen filter been changed?

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    Try and restrict the exhaust with a rag and have someone look under the bonnet and chassis for leaks

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    charcoal filter??

  6. #5
    audi-a6's Avatar
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    No the pollen filter has not been changed, but still the shouldn't be any gasses in the engine bay.

    does my car have a charcoal filter?

    with rags, worth ago I suppose
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  7. #6
    audi-a6's Avatar
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    so, bunged up the tail pipes and no blows what so ever, so it must be between turbos and inlet manifold?
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  8. #7
    audi-a6's Avatar
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    anyone got any ideas?
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  9. #8
    audi-a6's Avatar
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    one thing i have noticed is that when the engine is cold, the smell is constant and only when the engine is warmed up is when it only smells under power load
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  10. #9
    Sulli79's Avatar
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    Quote Originally Posted by audi-a6 View Post
    one thing i have noticed is that when the engine is cold, the smell is constant and only when the engine is warmed up is when it only smells under power load
    Maybe a cracked manifold or turbine housing if your sure its not gaskets
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  11. #10
    audi-a6's Avatar
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    would i not hear it though?
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  12. #11
    audi-a6's Avatar
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    and it seems weird that when you first start car, you can smell the fumes on both sides at the back of the engine, (when your under the bonnet)
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  13. #12
    Sulli79's Avatar
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    Quote Originally Posted by audi-a6 View Post
    and it seems weird that when you first start car, you can smell the fumes on both sides at the back of the engine, (when your under the bonnet)
    You may not hear it, both your turbos should be near the back on either side, you may be lucky and it's just gaskets
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    I had similar and was turbo-downpipe gaskets, but I could hear the leak

  15. #14
    audi-a6's Avatar
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    Quote Originally Posted by Sulli79 View Post
    You may not hear it, both your turbos should be near the back on either side, you may be lucky and it's just gaskets
    would that cause power loss?
    Passat B5.5 tdi....... big plans to come
    Audi A3 8p motor way work horse
    Nissan Skyline r33 gts-t ..... my mid life crisis fun car

  16. #15
    Sulli79's Avatar
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    Quote Originally Posted by audi-a6 View Post
    would that cause power loss?
    Between manifold and turbo it will because less gasses to spin the turbine, and turbo to down pipe may see a minor drop due to loss of back pressure
    1999 1.8TQS Saloon in Black/Dirt
    1999 1.8TQS Saloon in Silver Breaking

 

 

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