How to fix a misfiring engine in a Ford Galaxy?

I've noticed that my Ford Galaxy's engine is misfiring, causing a rough idle and lack of power. What could be causing this issue and how can I fix it?

One possible cause of a misfiring engine is faulty spark plugs. I recommend checking and replacing them if needed.

Another possibility is a clogged fuel filter. Consider changing it to see if it improves engine performance.