Im getting a tick from the driver side of the motor which sounds to be coming from just under the valve cover. The only thing i have done to look into it is the old long screwdriver test on the VC, which revelaed no noise at all, actually sounded very smooth. Now when doing that on the injectors, i definately feel the tick very loudly. I knw the injectors in these cars are known to tick more than others, but could they cause a tick i can hear while driving? btw, i beleive the injectors are stock with 165k on them, do they tick more when they get tired?