The ICV seemed to work as expected only after cycling with a 12V supply from battery. Idle dropped to normal. When the engine was shut off and restarted it stayed at the normal idle and the ICV was modulating. No other changes were made to account for idle drop from 1500 to about 600. Seems once warmed up an "shocked" it worked fine.

I repeated this step the next day as the same thing happened warmed up to a high idle and only dropped after 12V from battery.

Kurt