[PurpledawnA1]

We own a Kia Claris X reg it has developed a permanent missfire on one cylinder. The fuel injector is okay the spark plugs are okay the compression test is okay the diagnostics machine says there are no faults. The rocker cover has been removed and the valves appear to be okay the air supply is okay. Has anybody else experieced this and how did you solve it?

Thanks for any help you can give.