RobNab

Hello, I have a mitsubishi evo 4 that sometimes runs normal and now (most of the times) runs on only two cylinders. Both coils have 12 volt while ignition is turned on. I have multiple times tested for spark, that seems to be ok now. It all started with a bad cam sensor. I replaced that with a OEM part and it worked fine for a while. Then the problem came back. It usually happened when the car got hot after driving for a while. But now it is sometimes even running on 2 cylinders when its cold. The car also gave codes for ignition coil and crank sensor. I have also replaced the coils and the crank sensor with an OEM one. The car gave codes for ignition coil and crank sensor even after I replaced them, so I thougt it was the ECU that was the problem. I bought a secondhand evo 4 ECU and installed it. The problem did not go away. What else coud it be?