when i turn on the car it sounds good but after a good while the car feels very accelerated, if i put it in neutral the rpms go alot higher what rpm should it be at and how can i adjust it.

SOunds like you have a vacuum leak, the idle is none adjustable so don't try it or you will screw the minimum air rate flow up and unless it is reset you will never have a correct idle speed. Idle speed was originally around 550 rpm if memory serves me right. If you have no experience with FI cars I suggest taking it to someone qualified to do the repair otherwise you may make things worse