Ok, so when I turn my car over sometimes it shuts right back off. I figured that is probabl the spark plugs.. Also, when ever I hit boost or go over like 4k Rpm it will sometimes change my idle to 1500 or 2000. Anybody have ideas to what it could be? Thanks.

 

You should post this in the Forced Induction forum. You using the right heat range on the plugs? What's it tuned on?