Also check the throttle position switch. It's located under the flow sensor at the end of the throttle shaft. You can pull the pigtail off at the harness connector on top of the manifold. There is a WOT and idle signal line, plus a common ground.

This switch is often overlooked when dealing with idle speed control problems. It was the cause on my car, and once I cleaned around the switch and got good continuity on the idle signal the high idle went away.

Duke