I've just got home and on the journey back the car started to pop and seem like it was misfiring... not quite sure what this could be... thinking it could possibly be spark plugs but not too sure. heres a vid. http://s728.photobucket.com/albums/ww286/B...ent=Sat9Apr.mp4 The engine is knocking and the exhaust is shaking aswell due to this Gahh someone help lol.. it started to smell a little aswell...