hello good day i hope you can help me i have a 96 camaro z28 with a stroker kit 383 with a cc503 (224/230) the engine starts and runs, but when i read mi O2 sensor are missing the bank 1 sensor 1 has 0.450mV and the bank 2 sensor 1 has 0.150mV i already changed but they are still missing with the readings i have the LT1 edit and i already change the coolant temp, the injectors (36lbs/hr) and the idle speed (neutral 1k in gear 850) do i need more tune up ?? and how can i tell it to the PCM that the O2 sensors of the back are no longer connected ??

 

The 450 on b1s1 indicates you probably have a break in the wiring. You can test it by shorting the signal to the ground wire at the plug going to the PCM at the O2 to see if the signal then goes to near 0.

B2s1 seems as though it is shorted to ground. Unplug it and see if it goes to 450. If not, it's is definitely shorted.

The rear O2s can either be programmed out or you can use simulators like I do.