Quick and easy (I think question): When do L67s switch been closed-loop (reading the O2 sensor) and open-loop (maps only) operation? Obviously, they use open-loop when at WOT and on a cold start of the engine...but I'm curious more about where exactly it switches over (load based? tps based? cylinder airmass based?) Is it safe to say that whenever I see the Command AFR drop from Stoich, the car is reading purely off of fuel maps? ...that would make sense to me to use closed-loop to keep the car at 14.7:1 (or wherever you set it), and then jump to fuel maps as soon as you richen up from there.