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I was going rich in one bank, pulled plugs and found one was black (rich). Wound up being a bad coil pack on that cylinder. I have misfires turned off though due to cam.
Crazy thing is it would be ok on dyno but instantly go to crap on the road tests.
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2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)
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