01 740i sport- engine problem
So the other day i noticed that my car was shaking really bad when I was stopped at a red light light. like a vibration throughout my whole car. Then things just got worst from there, that night my check engine light comes on and the car literally shakes in park. You can see the motor shaking and my doors moving up and down. I took it to autozone and had the codes read, (p1351, p1343, p1345, and p1341) These we mostly misfire with fuel cut off in the cylinders. My dad thought it was the spark plugs, or coils and we replaced all plugs and the coils relating to the code. This did nothing. Now when the car is revved, smoke pours out of the exhaust and we don't know what it could be. Any advice or ideas?