Engine misfire and dont have power

I bought this car second hand. It hand a problem with low power. I installed a new fuel pump and it worked perfectly for about 6 kilometres. When my wife came back from the shop she parked the car. It stood for about two hours. I tried to start the car. It started but misfired very bad and had no power. I installed another fuel pump but no improvement. I replaced the fuel pressure regulator but still no improvement. The pistons keeps on flooding. I connected a ODB11 device. Erros code {P0100} is the mass air flow and {P0072} air temp sensor. I don't think that this is the problem. Could it be that the cylinder head could be cracked or a blown head gasket? The injector is opening and all plugs are firing. Or could it be worst like a hole in the piston or blow rings?