What is the best way to troubleshoot engine issues in a Vauxhall Astra?

I have been experiencing some engine troubles with my Vauxhall Astra. It feels like it's not running as smoothly as it used to and I want to get to the bottom of the issue. What are some common methods for troubleshooting engine issues in a Vauxhall Astra? Is there anything specific I should look for or check?

One of the first things you should check is the spark plugs. They can become worn out and cause engine troubles, so make sure they are clean and in good condition.

Another common issue with Vauxhall Astra engines is a dirty air filter. Make sure to check and replace it if necessary, as a dirty air filter can also affect the engine's performance.

Have you checked the fuel injectors? These can also become clogged and cause issues with the engine. It might be worth getting them cleaned or replaced.

Lastly, if you're still experiencing issues, it might be a good idea to take your car to a mechanic. They will have the proper tools and knowledge to diagnose and fix any problems with your engine.