hahaha, are we trying to re-write the laws of ECU physics or something here. Just give up man. Please for your sake. We can argue all day long but we are still right, serious dude we arent lying
ATMO BOVs make rich A/F ratios when venting... ECU has accounted for air it expects to end up in cylinder so adds fuel for air that has since been expelled through an ATMO BOV. Ie the fuel gets dumped but the air never made it into cylinder therefore higher fuel ratio to air, therefore lower A/F Ratios. Hoora!11