Light white smoke, misfiring code still on?

The vehicle overheated on me the other day because there was no water in the radiator, and started to make light white smoke from the exhaust whenever the car stopped. I also didn't drive for more than a minute when the car overheated. this only happens when the car is warmed up, I also got a misfire in cylinder 3, I changed the coil of cylinder 3 and changed all spark plugs, checked the cylinders ratio, they all run on the same frequency when accelerating, I added about 3 small bottles of fuel injectors, and I also checked the coolant reservoir and radiator, and they look good to me, no mixture of oil and water, and no leaks.