Hey guys im truly new here i purchased my dream car a 2001 mustang gt(4.6) zinc yellow i had it for about 7 months it has 130,000k miles on it, one day as i was driving approaching the eway my car randomly started making said sound (ticking/slight knock) luckily i was literally right around the corner from the house which i drove it back, im not a mechanic and ive been searching high and low for answwrs, but the sound from my perspective is coming from the passenger side under my valve cover i changed out my spark plugs and the noise is still there but it died down a bit its still loud though, but my car is stock i havent did any mods towards it, im praying that anyone here can give a young fellow like some tips i also have a video of the sound i will post.