How to diagnose an engine misfire in a Vauxhall Astra?

I am experiencing a rough idle and loss of power in my Vauxhall Astra. How can I determine if it is due to an engine misfire?

A misfiring engine can be caused by a variety of issues, including faulty spark plugs, ignition coils, or fuel injectors. I recommend starting by checking the condition of your spark plugs and ignition coils. If they look worn or damaged, it's best to replace them.

Another possible cause of engine misfires is a clogged fuel injector. You can try using a fuel injector cleaner or taking your car to a mechanic for a professional cleaning. However, if the issue persists, it may be necessary to replace the fuel injector.

In some cases, a misfire can be caused by a problem with the engine's compression. This can be determined by performing a compression test on each cylinder. If the compression is low, it may be necessary to replace faulty valves or piston rings.