Didnt really notice any black soot coming out of the mufflers when car was all stock but now that i installed ar design dp and pe mod muffler and tuned on cobb stage 2+fmic im getting a bunch of soot from the muffler. Had a cylinder 1 misfire after cobb tune and dp install so installed new delphi coils, nkg plugs and walnut blast so misfire went away. Not sure what it causing soo much black soot to shoot out im guessing maybe a bad injector or something that may be starting to go bad. Here is a pic of how much soots it have starting the car up for about 10 mins and revving it a couple times.
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Why soo much black soot coming out of exhaust???
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