i was driving on the highway yesterday and was accelerating pretty fast, but not redlining my p5, and after i get off the highway my car starts making a very loud clicking noise. It sounded like a bike with a baseball card stuck in the wheel, a continuous click click click, coming from what seemed to be either the engine itself or the transmission. After reving the car in neutral it went away but came back, and then my check engine light came on. The car idles very rough now and i think i might have misfired a cylinder or something. If anyone has an idea please help cuz i just ran out of my factory warantee by 500 miles and i know the dealership is gonna charge me through the ass to fix anything.