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Discussion starter · #21 ·
Now I see what your talking about, the thing in the red circle?
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Is this how you adjust the idle?
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I stuck my thumb between the IAC plunger and the throttle cable mount, it drove the idle way up then I watched it pull the plunger way in and bring the idle down...pulled my thumb out and the engine almost died then the plunger brought it back to idle. This tells me the ECU always brings it to a set idle so I'm wondering how that screw would even set a new idle speed?
 
Discussion starter · #22 ·
I was told to put the engine in drive and hold the brake, THEN turn in the plunger to the designated RPM; never in park, neutral or with the engine off. Seems to have worked too!
 
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