well the car came with a str fuel rail, and the ecu has a pyr racing chip on the ecu. as far as the exhuast goes it runs the entire length of the car and dumps out right behind the passenger side back wheel "i plan on getting a nice exhuast within the week if this problem isnt anything huge", as far as the smell goes it smells a little sweet like it is gas. think if my pluggs are fouling out it could smoke?