On my EJ207, with a 5 speed and Sti chromoloy 5 speed lightweight flywheel, I get sometimes a sharp drop when releasing the throttle, to where it almost stalls.
I've replaced the IACV and I've read about rising the idle by 1-200 RPM.
I've also read on other cars something about torque demand (for 32bit) and increasing that in cells close to idle and a more general statement about bringing fuel back in earlier.
Is this done for the 16bit by the load compensation table?