Just been having some issues with my car lately. On a morning crank the car idles at around 1100k rpm. As I drive and get to a redline it then idles at around 1400k to 1600k. If I step on the gas and let go of it real quick then the idle drops down to 700 rpm and then raises back up to around 1400k rpm. As I drove it to school today which was about 15-20 mins of driving. Came to the light and the car sounded like it was misfiring and then the idle started to surge up and down. I have no idea what the problem is but i have a skunk2 tb if that helps at all

 

i had this problem. pull back the throttle body a few times manually. if it stays open sometimes, and you have to push it to close, then it's probably the tps. check the voltage on the tps, it should be .50.