Its running .6 to .7 volts on the Left bank.. both on the Sensor 1 and Sensor 2 for that bank.. It ultimately trips with a Cat below threshold 430 code.. The O2 Sensor Check never sets.. the Left bank NEVER cycles.. starts rich from cold and stays that way.. the Front O2 is NEW on that bank.. the Fuel Injectors are flowing the Same all 6 within 2 CC.. Compression is 165 to 175 all cylinders.. Plugs are new..