I recently purchaced a neon. Some1 came to the shop and wanted to get rid of it. Problem I have is that. Piston #1 is not working. There is no knocking on the motor in idle, or when reving it up. head gasket is good. No mixture in the liquids. Going down the road motor works fine. Low idle it shakes bad. Going in reverse it has a hard time because of the idle. Im guessing Fuel Injector is bad. Spark plug has spark. Wires are good. Coil Pack is looks good Has spark comming from all 4 ignitors. It's a 2.0l SOHC. any suggestions would be helpful. thnx