How can I troubleshoot engine issues in my Ford Transit Custom?

Recently, my Ford Transit Custom has been experiencing some engine problems. I'm not sure what the cause is, but the engine seems to be struggling and making strange noises. How can I figure out what's causing these issues and how can I resolve them?

First, check your engine oil level and make sure it's at the recommended level. If it's low, top it up and see if that improves the performance. If not, it could be a problem with your spark plugs or air filter. Try replacing those and see if it makes a difference.

Another thing to check is your fuel filter. If it's clogged or dirty, it can cause issues with the engine's performance. You may also want to get your fuel injectors cleaned, as this can also help with engine problems.

If none of those things seem to be the issue, it could be a more serious problem with the engine itself. In that case, it's best to take it to a mechanic for a diagnosis and repair.