I've noticed that my idle is inconsistant. I don't believe it has anything to do with the speed senor because I've changed that expensive sensor a few times, yet the problem persists with idle speeds being as much as 2500 rpms with the throttle closed. It seems to be connected to full throttle events more than anything else. When the idle speed is high it will at times correct itself after an extended idle period. The air idle port in the throttle body is clean and the throttle blade is adjusted just barely open. Can the automatic idle speed motors get sticky over time?
I suspect it's in the tune because in the past I have times when the idle acted normally all the time. Which tables in MPTune affect the idle and is there a process for adjusting this.
Is there a way to bench test the automatic idle speed motor?