Welcome to the forum.
I have to do this once or twice a year to keep my car idling and running properly.
Disconnect the battery.
Remove the big black tube that goes from the filter housing to the throttle body.
Disconnect the 4 wire connector from the IAC valve. The IAC is toward the bottom of the throttle body, on the trunk side. I has a big hex integrated in it.
Unscrew the IAC using a big socket or some pliers. I usually use Crasftsman Robogrips because it's what I have.
Remove the valve.
I usually spray the valve, especially the pointed end, very well with throttle body cleaner. Wipe every last bit of black gunk from the tip, it must be perfectly clean.
Spray throttle body cleaner into the hole for the IAC the the passage visible just in front to the throttle blade in the throttle body.
Use Q-tips w/cleaner to make sure the passage is perfectly clean.
Wait 30 minutes to make sure the cleaner dries....it does bad things if it gets into the combustion chambers.
Reassemble everything, start the car, and let it idle for 20 minutes. Then take it out and make sure to give it full throttle, high rpm runs a few times.
After this, you should be good for about a year depending on driving habits.
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