Sorry for the delay, in the end the problem came from a loose screw in the exhaust camshaft number 2 and another broken support number 5 in the intake camshaft
Thank you very much for your interest and your help

Good evening, I have an opel corsa 1.2 16v x12xe engine with a failure in cylinder # 3, it fails at all times and the scanner says it has misfire in cylinder 3, it has changed the injectors to be tested and spark plugs and coil, compression Measure gives us 12kg but the engine fails as soon as we st...