I'm running the stillen supercharger kit. when I'm driving, the SLIP and AWD lights both come on and I lose almost all throttle response. I can push the pedal to the floor and it'll maybe move by 100rpms. I've looked this issue up before and what i found was the MAF extension harness as being the common cause so I recently ordered a new one and I'm still having the same issues . I've checked the codes and the only thing that comes up is an evap system code which I doubt has anything to do with issue I'm having. Anyone have any idea what might be going on?

 

Are you in limp mode? Even if the evap code wouldn't directly change your throttle response, it can put you in limp mode, which WOULD make your car behave as you describe.

 

As above - anything related to emissions will usually put you in limp and you'll go nowhere in a real hurry.