What are the common problems in a Ford Galaxy's engine?

My Ford Galaxy's (model year) engine is making a strange noise and it seems to be running rough. What could be causing this and how can I fix it?

It's most likely a problem with the fuel injectors or ignition system. You should bring it to a trusted mechanic for a diagnostic test and repairs.

This could also be caused by a clogged air filter. Try changing it and see if that helps.

It could be a transmission issue. Check the transmission fluid and if it's low or dirty, have it flushed and refilled.