where is the IAC located?
Try this thread:
IAC
Since you've already removed the air cleaner you might as well take the throttle body all the way off and hose it off really good with Berryman's B12. Then remove the EGR valve and clean the gunk out of the passages to the throttle body with a pipe cleaner soaked in Berryman's.
A complete UIM/LIM removal and cleaning should be near the top of the list sometime if the TB is as gunked up as you say it is.
