Yeh the aem does do this but it's not a faultless system by any stretch of the imagination this is because I'm running a cat for euro emissions standard. I need to keep the cat healthy and use the lamba and closed loop as much as I can (Road proformance)
I've just finished fitting a det3 to a eg civic d16y8 engine running the later coil on plug loom ECU, on a turboed.
I'm very impressed with it. If you need any help setting things up give us a shout. We use the pmw tables to activate the VTEC solenoid as it was also running a aftermarket cam.
Great ECU this vehicle is logging data also onit.