Well here is the deal my gf was driving our 99 taurus and it broke down on the road on her. I got there and when I started it up, it started fine but ran like it was running on 1 cylinder, and shaking like no other. The check engine light was "ON". I tried to give it gas but when I did that it just sputtered and felt like it wanted to stall. So im getting it towed to my house. What do you guys think it should be and where should I look first?