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Relationship between IGN controlled idle and IAC valve

Posted: Thu Oct 13, 2016 7:25 pm
by dogmoo
I'm curious can someone definitely say the difference between the IAC control and ignition control idle. I haven't found anything that explains exactly how they work with each other.

In other words do they both seek to correct idle independently of each other or is it a master slave scenario? The Help menu explains how they work but doesn't state how they work together.