2000 Chrysler Scorpion Cooling system issues

I recently bought my 2000 Chrysler Sebring V6 Coupe, I did most of the basic stuff, check the fluids, refilled them, and even add replaced some of the parts it needed. It has started to overheat. I replaced the thermostat first, MAP sensor, Temp sensor, and a pressure release radiator cap and it still reading overheat, I replaced the radiator. The radiator worked a lot better because it was time to be changed, But it still says the engine is about to overheat but it doesn't smoke in front or behind the motor. So I went and got a water pump but I haven't installed it yet but I'm not certain it's time to be changed. Can you help me?