This is going to sound crazy. My car has a popping sound out the exhaust at WOT. I thought it was the old Pitbull mufflers I had on there getting worn out so I changed them to Magnaflows. The car does the same thing. This does not sound or feel like an ignition or fuel miss. The PL numbers are great across the board. The car pulls like a bat out of hell. It just has this sound out of the exhaust that is it never did before with my old combo. Maybe thats how its supposed to sound. Its almost like the flow of air is straining to get out of the tail pipes but it cant do it fast enough. I dont believe it is a real miss because I have had problems with miss/sputter/popping over the years and it is not the same. It could just be how this ATR SS dual system sounds. Anyway back to the question. If I did have a FP-lean issue or an ignition problem would PL pick it up? I have the the FP logged and it is rock steady at 67 psi the whole time under WOT.