I have under 500 miles on my 2019 Tacoma Trd sport 4x4 3.5 by. It makes alot of tapping noise on the passenger side upper part of motor? I didnt notice when I bought it. Maybe excited, looking at future upgrades. Never noticed if it was there before the 500 miles? I've been hearing foul injector cleaner alot? I've been an old school mechanic since 1977. So i have no experience with all these newer motors at all? But I've done my share of lifter replacements, adjusting valve rockets, etc. Anyone?