For example, A/F starts at about 13.7 at low boost/vacuum to about 11.5 at 30# boost. Any change to the weather conditions and the wide band O2 will add fuel and potentially save an engine.
Allan G.
I would never let my EFI go closed loop with e85 especialy If your not using a lab grade sensor.
Huh?
detonation shows up as a rich condition to the 02
Generally, you would have _very_ small limits programmed in for removing fuel based on O2 to safeguard against this sort of thing. Better to have the thing loading up and going pig rich while you tune than have it erroneously take out fuel when you need it.
