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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
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    DJM1982 Member

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    [Nov 17, 2011]
    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
    #1
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  3. rowdyboy
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    rowdyboy Member

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    [Nov 17, 2011]
    I seem to remember a thread mentioning the EGR valve can cause it. Maybe a good clean would help.
    #2
  4. Wrath
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    Wrath Well-Known Member

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    [Nov 17, 2011]
    Yep, I vote for the EGR valve being dirty as well.
    #3
  5. DJM1982
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    DJM1982 Member

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    [Nov 17, 2011]
    you link take me to the halfords website?
    #4
  6. DJM1982
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    DJM1982 Member

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    [Nov 17, 2011]
    how easy is it to clean, i'm completely hopeless with engines?
    #5
  7. Wrath
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    Wrath Well-Known Member

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    [Nov 17, 2011]
    #6

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