as i was inspecting the vacuum hoses, and replacing a few pieces, i noticed the hose from the AIC to the intake manifold was bulging out and when the engine was revved, it puffed out! not good, i figure. so today i wandered over to O’Reilly’s auto parts and found a two dollar piece of hose that was exactly the right size and brought it home. when i took off the AIC, It was an ugly mess inside. So I did a little research on cleaning it, and the closest thing I had was mass airflow sensor cleaner, so I flushed it in until all the black crud stopped coming out and reinstalled it and the hoses. smoother idle! It has been oscillating a bit when I was idling, and that is to have gone away. i also don’t notice that idol dipping on occasion like it used to either.