i have an 02 sentra XE 5 speed. when starting first gear i can hear what sounds like a click noise, as if something is hitting something else, however it does not do it in any other gear. the best way to describe it is sounding almost like a misfire type of noise, however it is not a misfire. the only thing i've done to the car is a cold air intake, but i dont believe that its that moving or n'ething. Any ideas?!?!?!