I can drive but i can't stop

My car recently developed a problem. It works fine till it warms up. Once it warms up I can still drive it but when i stop the idle hits like 500 and then the car slowly stalls out. I thought it was maybe the injectors so i took them out and cleaned them but it didnt help. Has anyone else had this problem. Any guesses would help before i take it to the shop. Thanks in advance.

You only get this when it warms up? Now thats odd....

All I can do is guess which isn't much help at all. Perhaps something with the throttle..... http://www.team3s.com/~egross/3S/Maint/All/ThCaAdj/

that was one thing i made sure was set tight after i put my injectors back on well. I guess im gonna bite the bullet and take it to a garage. thanks for the guess though.