Quote Originally Posted by Danny Cabral View Post
The IAC Parked Position is not a mechanical adjustment; it's a short duration (software programmable) IAC opening adjustment for cranking & afterstart. The silver spring loaded screw is the idle speed screw.
Yes! Turning the idle speed screw will affect the throttle plates which affect the IAC Parked Position, this is what I meant to say.

Interesting that the manual that shipped with the 550-400, doesn't point out which is the Idle Speed Screw. At least mine didn't.