I’ve been running on closed loop for a while, it has come a long way. If you want the most out of your stepper you should try 3.0.3r as there are some key fixes kens made in the closed loop algorithm on how it engages and saves the last known good steps. Even though 3.0.3 isn’t officially released it’s a very stable code for the 420a. 2.1.1-3.0.3r features better map sampling which makes your idle, cruise, response and a few other things smoother than 2.1.0. I run an ignition advance of 14 with an injection angle of 450 @ 14.5:1 AFR. MS doesn’t lose steps like it use to, the steps are correct from all the tests I’ve conducted on my spare TB. I should also mention that reducing PW at the bottom of the map helps the IAC come to a rock solid idle.

-Rafiel