How do I troubleshoot my Kia Rio's engine misfire?

I recently noticed that my Kia Rio's engine is misfiring. I checked the spark plugs and they seemed fine, but the issue persists. What could be causing this and what steps should I take to fix it?

It is important to determine if the misfire is occurring in one specific cylinder or multiple cylinders. If it is just one cylinder, it could be a faulty spark plug wire, ignition coil, or fuel injector. If it is multiple cylinders, it could be a clogged fuel filter or a vacuum leak.

Make sure to also check the ignition timing and compression of your engine. A misfire can also be caused by a problem with the timing or low compression in the engine.

If you are not confident in your abilities to troubleshoot and fix the issue yourself, it is always best to take your Kia Rio to a certified mechanic. They have the knowledge and tools to accurately diagnose and repair the issue.