ive been hearing this rattling noise while accelerating or standing still and give it some gas. if anyone has ever heard the sound of a spark plug thats loose and gets that rattle noise it kind of sounds like that. or if theres something in the cat?

I tried looking up some videos about the timing belt tensioner and it doesnt quite sound like that, i dont hear it on idle and its higher pitch sounding than that as well.

Here's an actual video. Ignore the sai pump noise it happens after that.

 

found out what it was... its the n75 valve.