Hello again every one. Its been a couple of weeks since I checked in, been running around with the dealerships bull. So this is where I am. Still having multiple miss fires, bank 1 only. the dealer said everything I did was perfect. Tmb , O2, spark plugs, mass air, ocv, coils. I'm missing something. Bottom line they came back with bad cats. changed the cat coming from the block and the one before the resonator. still nothing has changed. The dealer is claiming that the resonator is also clogged. To prove to them that it has nothing to do with it i disconnected the exhaust @ the flange where the y meets the cat before the resonator. same thing. nothing has changed. yes the o2 is not reading flow. but when its all connected the first cat off the block gets cherry red( to much fuel being dumbed). what can it be? I have a feeling these guys r messing with me.... thanks for your input.