Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
this is being done with O2 unplugged to try and determine if engine is actually running leanthere are some idle airflow trims that prob need to relearn also
idle airflow trims are just for idle control, the 02's if u unplug them will prob default to a OL richer commanded fuel for safety, if u can read the 02 data close to 0mv is lean, close to 1000mv is rich, if unplugged or wiring issues it can stay at the 450mv without moving showing open circuit issue,this is being done with O2 unplugged to try and determine if engine is actually running lean
or faulty O2 sensor circuit
is the 02 just flatlining at the 450mv or does it still move when some throttle ?Lh O2 was reading 450mv with plus 22% fuel trim
so trying to determine if actually that lean on one bank only
and why ecu added that much fuel if O2 open circuit
thats what the left one was doing before I took it to a mechanic.... they didnt resolve it.... now both are doing it.....if u can watch the 02 from dead cold as they always start at the 450mv and soon as the get enough heat they begin to move with the fueling then once they are up to set temp they are reliable the ecu uses them for feedback, if it never moves from the 450 then sounds like its either unplugged or has a wire open circuit on the signal side which would need testing