Knocking sound when I accelerate

I am not sure this would be caused by a spark plug unless you have a misfire.

What I would suggest we do is start with you getting a video recording of noise so that we can get on the same page with you.

Basically, if we make an assumption on this it could be way off. So, this could be a misfire or even an engine knock, so we need to start with getting on the same page.

Also, we should check and make sure there are no codes as that would cut down on a lot of checking.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If this is a misfire, here is a guide that will get us started:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Basically, we need to run through this info and let us know what you find.

Thanks