89 sunbird 2.0 OHC

Im Having Problems With The Idle It Idles Like Crap And After Driving For 10 Minutes Or So It Wants To Stall Or Does Stall Completely And Does Not Want To Start. Not Very Car Smart So Any Help Would Be Nice?

i had a stall problem with a 91 sunbird, check to see if the cat is cloged.

THe car does not have a cat it was clogged along time ago so i took it off and put a blue bottle in its place which seemed to work out pretty good. Any other advcice would be great as i dont even know where to start

Thank u