My friend recently bought a G35X 07 sedan for dirt cheap and it’s been having issues accelerating from a stop, you can see it bog down as he floors it (car was warm). This only happens sometimes as well. Any help would be appreciated. If any more info is needed lmk.

 

Is the check engine light on? That's some pretty extreme surging.

I would pull and inspect the plugs, look for vacuum leaks.

 

No warning lights. I will check for vacuum leaks and the plugs thanks.