When you first start the car when the car is cold, does it idle fine? Once the car is warm, does the car idle high? Back on my old 4g64, when my IAC died, it would idle normal when the car was cold, but once it warmed up, I would have a hefty 1.5-2k idle which was annoying.
Usually when the IAC goes bad your idle will be unusually high or it will vary from low to high.
To be sure its not the cable sticking, when the car is running, go under the hood, where the cable attaches to the TB, just twist it closed. If its already closed it wont move or wont move much and the idle will be the same. For some reason if its sticking, it should close and your idle will go back to normal.
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