High Idle problem

Starting a couple weeks ago my car would idle high. It could be in the morning when it was warming up or when it was already warmed up and I'm sitting at a light. It does it at any random time. I know it's not a tune up problem because I just gave my car an oil change and tune up. It doesn't idle high all the time just randomly. Usually when it does this it's about 2,000 RPMs. Sometimes it drops down to about 1,500. It's killing my gas! If you have an suggestions or answers please let me know. thanks.

Does your A\C work? Mine doesn't and if I try and turn it on the idle goes from 750 to about 2200 rpm. It is irradic like yours and doesn't do it the whole time the A\C is on, just randomly. Just a suggestion. Good luck.

try turning the idle screw down a little. its on the throttle body.

Yea i know. That's not what's wrong with it though. I wish that was the problem.