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I wasn't referring to Power commander it seemed to me some people were planning on simply replacing the o2 sensor with the resistor which would not be a good idea. If you plug an OBDII scantool into the ECU you'll see the ECU rapidly switching from open to closed loop. In addition the ECU also applies long and short term fuel trims based on the input from the o2 sensor (in closed loop). In a 'perfect' world the ECU's maps would be perfect and the o2 sensor wouldn't be needed. But even a well mapped ECU will drift over time as the engine and other parts wear. But remember the o2 sensor is only assisting with fueling in closed loop. It doesn't work either on startup (which is why they have a build in heater) or outside of steady state throttle openings.Even if you were running Power commander I can't see the harm in retaining the o2 sensor, but then again I haven't looked to see exactly how PC interfaces with the OEM ECU.
I wasn't referring to Power commander it seemed to me some people were planning on simply replacing the o2 sensor with the resistor which would not be a good idea. If you plug an OBDII scantool into the ECU you'll see the ECU rapidly switching from open to closed loop. In addition the ECU also applies long and short term fuel trims based on the input from the o2 sensor (in closed loop). In a 'perfect' world the ECU's maps would be perfect and the o2 sensor wouldn't be needed. But even a well mapped ECU will drift over time as the engine and other parts wear. But remember the o2 sensor is only assisting with fueling in closed loop. It doesn't work either on startup (which is why they have a build in heater) or outside of steady state throttle openings.
Even if you were running Power commander I can't see the harm in retaining the o2 sensor, but then again I haven't looked to see exactly how PC interfaces with the OEM ECU.
