What are common problems with the Ford S-Max engine?

I've been having some issues with my Ford S-Max's engine. It seems to be making strange noises and not running as smoothly as it used to. Can anyone give me some insight into potential issues and how to address them?

It is possible that your Ford S-Max's engine is experiencing issues with the fuel injectors. These can become clogged over time and may need to be cleaned or replaced. It is also important to regularly change your oil and air filter to prevent issues with engine performance.

Another common problem with the Ford S-Max's engine is a faulty ignition coil. This can cause the engine to misfire or run roughly. It is important to have this issue diagnosed and repaired by a qualified mechanic.

In addition to these issues, it is important to regularly check and maintain your Ford S-Max's spark plugs. Worn or dirty spark plugs can also cause performance problems with the engine. It is recommended to replace them every 30,000 miles or according to your owner's manual.