update ; compression was 205 on #8 195 on #6 plug looked wet on 8 so i put new plug in 8 and switched coils on 6&8 no misfire codes but still have a stumble and lean bank 2 code. i switched both down stream oxy sensors to see if ltft would change no change still ltft 6 on bank 1 and 24.5 on bank 2. i am thinking maybe i have an injector problem on bank 2. the engine smooths out at around 1800 rpm and runs fine from there up