my car idles high

[Lrizzel]

my 99 gs-t when i start it. it jump right up to 2000rpms, its stays until i hit the gas an then it idles up an down from 1800-2000 real fast, but when i turn it off it wont start up, i have to wait a hour then it starts up but it does that again...idk

 

[rarson]

http://www.vfaq.com/mods/BISS-2G.html
http://www.vfaq.com/mods/wayback/BradBauer/engine/surge.html