Quote Originally Posted by Dr_Grip View Post
I know I am still a n00b regarding fuel injection, but AE is needed for an engine to work properly no matter whether it's in open or closed loop: The moment the throttle is opened, an extra splash of fuel has to be injected proactively so the engine won't lean out before the o2 sensor even detects it.
I've not been able to find anything that states in stone so to speak that AE is open loop only. Found plenty that concur that PE is open loop only.

In any case, it appears that I am seeing a slight lean spot during "normal" acceleration, especially when the TCC locks up.