knocking sound (or pinging) is very hard to describe.
if you can hear a metalic sound or if it sounds like "shaking a can of sand/marbles" or a rattling sound ...when u accelerate your engine, then your engine is knocking.
sumone plis help me find wiring for my car..the original one cannot be used.its an rb20det manual engine.need help urgently..plis pm me or msg me-0124790580 then i'll kol u bck..