2007 GT500, Black w/Red Stripes
I have been getting a severe misfire while under heavy/full load at 4500-5000RPM. I have a CAI from SCT with a pulley and moderate tune. Last year I had a misfire under any load that was caused by failed coils, 7 of 8 had cracked. Car has been running well after that but I noticed within the last couple months the high load misfire. I have the SC out of the car and have pulled a vacuum on the bypass actuator and it will hold without issue. I have looked over the rest of the vacuum lines and all are good. I have full boost and no check engine light. The code I have is for a bypass valve stuck closed. There are no other codes.