The 86 doesnt have a IAC. It uses a VSS to kick the idle up when the A/C is on.
On the valve cover are two VSS's the rear one Near the fire wall) is for the fuel pressure regulator and the front one is the A/C Idle up. Trace the lines and one of them comes into a funky deal with 3-4 hoses on it and a plast screw sticking up. That screw is what sets the idle for the A/C.
So now go set your base idle back to 750-800 with A/C off, in gear since its a Auto. Set the A/C idle with the screw.
