Saturn high idle problem

Your not supposed to ever adjust the factory set throttle plate adjusting screwing. The computer control's the idle do you have any code's?Most of time when you have a high idle it's caused by a vacuum leak what rpm does your car idle at?I would check the S shaped short hose that goes from your intake manifold to your pcv that sits in your valve cover. They get hole's in them and leak vacuum and cause high idle's.