The car was shaking and it was stuttering and hesitating. The pick up was very slow. The fastest it went up to was 45 mph. It felt like it was changing gears while I was driving it. Then when I reached a big hill, and thought it was going to die out on me, all of a sudden it kicked in and just zoomed up the hill. It was very weird. Then when I restarted it, the car was in perfect condition, like it never happened. But while it was happening, I really thought the car was going to die on me.