This all happened overnight, i was driving my car one day, the next day it just decided to not function properly. I bought the car in May 2011, and its now October, the engine shakes violenlty when i put it on reverse, or on drive, and the car accelerates at a weak level. I only use the car for work, and i live 5 miles away from work, could it be the car needs a simple tune-up, or is it too late??????