Good morning, the engine of my Ford Ka RU8 built in 2009 has been running a bit rough since a few days at the start. But it finds itself after a few seconds. Now it sounds as if it is only running on 3 cylinders. Spark plugs are changed, cables look obviously good. My question: Shouldn’t be reported in case of ignition or problems with the injection, at least the engine control light ??? Thank you in advance for the comments !!!