Engine is warm after 20 minute drive.
First pic. O2 sensor unplugged, FV defaults to 50% as it should, AFR set to about 13.6 as seen here:
Second pic. O2 sensor plugged in. FV previously set by me at 40-45, AFR drives leaner to about 15.8 as seen here:
Is this normal lambda controlled AFR behavior for warm idle?
Secondly, if FV number decreases from 50 to 40, shouldn’t that richen the AFR?
Thanks