the car
idles up and down after running for a few minutes and continues to do so for anywhere from 10-30 min. once the car gets good and warm(engine temp) it will stop by itself or if i cut the car off it stops until the motor completely cools and i start it again.

car is a 91 accord ex 5spd. list of things ive tried so far for idling problem.

replaced air filter
replaced egr valve
cleaned iac valve
cleaned iac motor

the haynes manual lists a few things that could still be wrong but i wanted to hear from someone with a little experience b/c haynes doesnt go into depth on a lot of issues. any help would be appreciated!