Quote Originally Posted by PJT View Post
I only turned it -90 degrees, so from 12 to 9 o'clock.

The light on make the revs drop like its adding load to the engine.
Technically the iacv motor should compensate for this and increase the rpm to the setpoint. Maybe this is faulty.
It is worth turning it the other way, maybe 180 degrees and see if it increase the idle.