My car is very loud, bad acceleration, smells like burning fuel often, rattles, and a funny noise coming from tailpipe when in park. Almost like someone beating softly on a drum? Engine light comes on occasionally. Had it checked, code 43 (fuel system). That is all they could tell me. I just replaced old spark plugs and wires a week ago thinking it would help because my car would cut off when I reversed with wheel turned. It stopped doing that. It vibrates aggressively when on brake, sometimes I am scared that the car will cut off. Can someone please give me some feedback as to what may be wrong and how to fix? Thanks.