Need help!!!!!!! High idle when warmed up
 

I have a ka24det, gt35r, nistune. The problem is the car runs great until it warms up. Then it starts running rich and gets crazy idle that holds at 2000 rpm. Its almost like the throttle body is getting stuck opened. I took it to a friends shop, we hocked up his laptop to see whats going and its starts happening right at 100 degrees. He thinks i need another fan (im already running two). Just want to see what you guys think. Thanks.

do you have an o2

maybe a house or a tube has a hole

yes im running an o2