Why is my engine making a strange knocking noise?

I recently bought a Vauxhall Combo Life and have noticed that the engine sometimes makes a strange knocking noise. It usually happens when I accelerate or decelerate. Can anyone advise on what could be causing this and if it's something I should be worried about?

Hi John, thanks for reaching out. The knocking noise could be a few different things, but most likely it's related to the engine's timing. I would recommend getting it checked out by a mechanic to avoid any potential damage. You could also try using a higher grade of fuel to see if that helps.

I had a similar issue with my Vauxhall Combo Life, and it turned out to be a faulty spark plug. Definitely get it checked out, as it's better to catch it early before it causes bigger problems.

Hey John, I'm not an expert on cars, but I've heard that the knocking noise can also be caused by low oil levels. It's always a good idea to check your oil regularly and top up if needed.