My Nissan Station wagon 2003 engine 2.0, even after changing the ignition

My Nissan Station wagon 2003 engine 2.0, even after changing the ignition, then the airflow meter the rpm still refuses to surpass number 3 and it even stresses the engine to get there, also the engine get so hot that it overheats, but discovered that it’s one fan that works, I have also changed the ejector sensor, the car was perfectly fine not until after the holiday it was parked for 3weeks without use,