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      11-19-2012, 11:22 AM   #7
Cali FlyBoyZ
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Drives: 335i Coupe 6MT
Join Date: Dec 2011
Location: Washington DC

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It's definitely probably a misfire lol... no, but seriously try checking the codes it threw. I had the same issue. I have a cobb tune and once I reach about 15psi, I too would hear a bang and a weird note coming from the exhaust. Turning the car off def made it go back to normal, but if I punched it, I would get the same exact problem. I changed the ignition coils and spark plugs and the issue went away. You may only need to change the spark plugs, but Im at 80k and drive like a maniac, so I changed both lol
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