So, as the thread title states… Ever since I’ve had my car, I’ve had an issue with a “backfire” when I’m hard on the accelerator and letting off to shift between gears. It seems to be worse between 1 to 2 and 2 to 3, but almost non-exhistant after 3rd gear under heavy acceleration and only seems to be really bad if I’ve been idling for awhile in traffic. Guess I shouldn’t call it a backfire…it’s more like a very loud pop. I’ve always attributed it to my exhaust, but now that I have a new OEM cat, it seems to be worse. This is why I’ve tried to find the tuner/previous owner. I obviously don’t want to do any damage to the car……would this be normal? Would it be something to be concerned about?