Hey guys I have a 2003 Sunfire with 150k miles and am having some trouble. About a week ago there was a sudden vibration when coming to a stop and the car choked and died. It started back up and we haven't thought much about it since. Today, when we started it up the vibration was back, really bad. I looked under the car and could see the entire exhaust vibrating really violently. The engine will barely accelerate and then chokes and dies. There is also a noticeable fuel/exhaust smell. Any ideas what could be causing it? It's stuck in a friend's driveway right now, trying to see if it's something I could fix myself before paying to get it towed and diagnosed. Any help would be greatly appreciated.