Why does my left exhaust bank smoke - Mustang Evolution

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Old 04-12-2012, 08:10 AM   #1
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Why does my left exhaust bank smoke

I hit high speed and black smoke from my left bank comes out what can it be
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Old 04-12-2012, 08:43 AM   #2
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It's your Air/Fuel ratio going rich. (More Fuel, less Air) When you're rapidly accelerating its common to burn rich causing black carbon soot to blow out the exhaust. The reason it's coming out on one side is because either only one side is burning rich or most likely your catalytic converter on the side that's not smoking is absorbing the soot.

Unless its smoking all the time I wouldn't worry about it.
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Old 04-12-2012, 10:33 AM   #3
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I dnt have cats but how would I fix it
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