I did a tune up recently and well on 2nd and 3rd gear my car starts tugging. It feels like its missing or something. Anyone know what it can be? Also my Active Aero works every once in a while was woundering if some one knew if the dealerships charges alot to change them out? But it works everyonce in a while than the Aero light comes on in red as if the spoiler is out. But people tell me diff things that there are 2 in the back and one in the front. Well any ways thanks guy.

 

it is like slip, right? it might be the clutch problem, what are you transmission?