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Excessive soot / smoke on acceleration, possible causes?

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by DJM1982, Nov 17, 2011.

  1. DJM1982

    DJM1982 Member

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    I have a 2006 2.0tdi sline 140, remapped to 180bhp.
    Over the past couple of weeks i have noticed much more black soot / smoke coming from the exhaust under hard acceleration.
    There has always been a small puff of soot which i put down to it being a diesel. But like i say its getting alittle excessive now, i mainly notice it in 3rd / 4th gear and i have noticed no performance drop off at all.

    Any potentail cause for this increase? Or does it just need a good service? Anyone else experienced this with there car?

    Cheers
     
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  3. rowdyboy

    rowdyboy Member

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    I seem to remember a thread mentioning the EGR valve can cause it. Maybe a good clean would help.
     
  4. Wrath

    Wrath Well-Known Member

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    Yep, I vote for the EGR valve being dirty as well.
     
  5. DJM1982

    DJM1982 Member

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    you link take me to the halfords website?
     
  6. DJM1982

    DJM1982 Member

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    how easy is it to clean, i'm completely hopeless with engines?
     
  7. Wrath

    Wrath Well-Known Member

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