I know that this will be a long drawn out fix if it is even possible? I'll start with what I do know. I have a SBC with a tuned port system running a 411 ECU, Vortec distributor for the cam signal, a Vortec 4X crank signal. the problem is it pops and backfires, it gets worse at higher RPM. I have not been able to get the cam/crank relearn accomplished. will the lack of relearn cause this issue? the O2's are all over the place as well.