Alright, after months of my idle getting progressively worse, I believe I pinpointed the problem. Vacuum leak. When I'm driving, I can hear a distinct hissing or sucking sound, almost as if its breathing. Anyhow,With the car idling, I sprayed carb cleaner on the area where I could hear the leak and sure enough, the idle surged. I couldn't get a clear enough picture of where I sprayed it, but I traced the hose and below is a picture where it ends up, It is the hose on the right that connects to the throttle body. Is this in fact a vacuum hose and if so, does anybody have the name or part number?
where it connects to the throttle body
and here is where it connects under the intake