Ok first off i went to a dyno day at topspeed and i went through 1 pull and then another trying to get a custom tune and the found out the headgasket was going out.

No onto today i replaced headgasket, all timing ect.,plugs ngk 8s gapped at 25 to 26,. Also i installed a perrin intake and filter took off the stock box and intake. I had a mitsu trained mecanic help me do this.

Now the car dosent want to idle or it cant find its idle anywhere from 300 rpms to 2000 it dosent jump around its just when i stop it is one or the other. Otherwise it doset surge. And the car is also cutting out at around 2500 rpms under light throttle. But under full throttle it pulls great! What could be the problems my tune? Oh yeah it was cutting out like that before i did all this stuff just not as bad.