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Thread: Black Soot on rear of ATS 2.0T

  1. #1
    Join Date
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    Black Soot on rear of ATS 2.0T

    I have a 2.0T - about 7K mi -- I notice the other day there is a lot of black specks on the back of the bumper and trunk - looks like black soot from exhaust. My car is silver so it shows up easily. Haven't ever noticed this before - but I was doing some spirited driving the other day..... Anyone else notice this?


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  3. #2
    bruff1977's Avatar
    bruff1977 is offline Cadillac Owners Fanatic
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    Sounds like you're running a little rich. Hated that when I had my Cobalt SS. Rather have that than to run lean.

  4. #3
    M5eater's Avatar
    M5eater is offline Cadillac Owners Connoisseur
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    Re: Black Soot on rear of ATS 2.0T

    but I was doing some spirited driving the other day.....
    Normal.

    OEM Tunes use fuel dump to reduce EGTS and make sure the power train is protected from detonation.

    If you get behind any modern car that really does a bit WOT, you can even visibly catch it(a puff of black smoke) sometimes.

    The result being dirty rear-ends.

  5. #4
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    Re: Black Soot on rear of ATS 2.0T

    Kind of like a "shart" by your car.......

  6. #5
    romanats is offline Cadillac Owners Fanatic
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    Re: Black Soot on rear of ATS 2.0T

    I have a silver one and have the same thing lol I actually thought its from tires being buned

  7. #6
    Stevo Supremo's Avatar
    Stevo Supremo is offline Cadillac Owners Connoisseur
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    Re: Black Soot on rear of ATS 2.0T

    lol shoulda seen my pipes after my track day haha!

  8. #7
    EnvoyBu's Avatar
    EnvoyBu is offline Cadillac Owners Fanatic
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    Re: Black Soot on rear of ATS 2.0T

    Quote Originally Posted by Stevo Supremo View Post
    lol shoulda seen my pipes after my track day haha!
    You should see my pipes after a day of regular driving.


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