the car runs and drives.It started when i started to get no power on the hill. I changed the spark plugs and sparkplug wires. And it is still the same.The engine sounds good.sometimes i get no power and sometimes it acts normal.Could be alot of things. Need more information like what happened before the no power situation. First place I'd look from the fact you say it will start and run it could be fuel delivery such as filter and pump, bad ignition coil or module, clean air filter......or the engine just gave up from lack of proper maintenance.