How to troubleshoot engine problems in a Ford Galaxy?

I am experiencing some issues with my Ford Galaxy's engine. It has been making strange noises and feels sluggish. What could be causing these problems and how can I fix them?

It sounds like the issue could be with the spark plugs or fuel injectors. I suggest checking and cleaning or replacing them if needed.

Have you checked the air filter? A dirty air filter can also cause engine problems. Make sure to clean or replace it regularly.

It could also be an issue with the fuel pump or pressure regulator. Have those checked and replaced if necessary.