Once again, sorry to revive a dead thread but I'd figure I'd help out the lurkers. My injectors are pretty loud as well, and the sound does get louder when I rev the engine, is this normal?91SilviaKs wrote:take a long screwdriver and put it to the injectors. If the clicking matches the one your hear it is the injectors. If it rises with engine RPM, hold the screwdriver to the head and listen to the end while you give it gas. Is the noise there?? Repeat process on the UOP. Youll know when you hear it, and youll find where the noise is coming from....