Why is my Ford Galaxy's engine making a knocking noise?

I noticed that my Ford Galaxy has started making a knocking noise when I accelerate. Why is this happening and what should I do?

It's hard to say without more information, but it could be an issue with the spark plugs. I would recommend taking it to a trusted mechanic and having them take a look.

I've had this issue before and it turned out to be a problem with the fuel injectors. I would suggest getting those checked out.