Ok guys the cars still falling on it self at cruz is it the opti or ?
Its like a miss then gone then back more so when hot.

 

A little more of a description moght help. It could be the opti but you should check several things first. A lot of people have tried the ICM cooling mod http://shbox.com/1/4th_gen_tech2.html#ICM_cooling with great results. I'd look into your coil and icm, plugs/wires and other smaller stuff first. Does it throw any codes? Do you have acces to a scan tool?