try getting rid of those **** bosch sensors too

 

After cool down, I can monitor the sensor voltage output of Rt and Left bank. Since they are heated sensors, both outputs were identical with voltage dropping @ an equal rate to zero (lean) with ignition power on, & engine not running. Left bank O2 sensor (thought dead) is alive now!!? Under engine load and heat, Left side sensor goes lean to zero volts, and left bank loads with fuel (Rt side OK) No header leaks detected. I cannot find any mfg. data or specs on O2 sensors relative to voltage output performance vs. temp. So, I'm moving them downstream. What brand sensor do you FI guys use with gm PCM (obd 1 or 2)??? Mfg's performance all appear to be the same.
Thanx. B.