'01 V8 A/T 4x4 150k
Bank 2 O2 sensor replaced at 135k
Suddenly (on 1/2 tank of new gas) reading codes for misfire on all even cylinders (bank 2) and rich mix b2 ,BUT lean mix on b1. Runs like crap, multiple misfires at all RPM. I understand that a bad O2 on b1 might richen the mix and cause...