Idoling problem...

Ok, so I have the classic idoling problem. It's not a cold idol tho, because when I first start it up it idols perfect, but after I've driven it for a while it will idol irreguraly, and this doesn't happen all the time. I pulled the IAC, cleaned and inspected it today, and it helped a little bit. Any ideas?
 
Since I am not sure what idling irregularily means, I would run through Jrichker's idle surge sticky at the top of the sub-forum here.