John_D.

iTrader: (2)

Had this inspirational thought last night.

When rear o2 sensors are deleted (rather than sim'd), does COTS go active and start adding fuel at idle???

This could explain why my idle is just a bit rich even though ltrims and wot wideband look dead on.

jimmyblue

iTrader: (11)

COT jacks your fuel/air multiplier around to do its thing
so this should be obvious if true - log that PID. But I
doubt this is the deal.

P Mack

iTrader: (6)

Just turn cots off. Just one less thing to worry about.