...bad exaust smell.....? all of a sudden really loud exaust and it smelled bad and it wouldnt go faster then like 15mph...when you start it up or press on the peddle it sounds like one of the jet race boats.....i put oil in it and more gas but nothing helped......what do you thnk could be wrong and how expensive? should i just have one of those junk car places give me money for it...you can still turn on and drive like in parking lot but it sounds so bad