how does the igniter affect each cyl reason i have a miss fire in bank 2

What is your question?

swaped coils and plugs and done compression swapped injectors fuel trims indicate ignition miss in cyl 2 and 6 more on 2 than 6 its only affecting bank 2 o2 switching both banks seems to stumble cold but run good for few minutes till computer has to start adding and subtracting fuel then it starts miss fire not imediaetly like it has to heat sink its self to start missing swapped parts and problem stayed in them cyl.