I BOUGHT A 91 Z28 WITH ALOT OF LITTLE DETAILS THAT NEED TO BE FIXED BUT ONE OF MY BIGGEST CONCERNS IS THE TACHOMETER.. WHEN THE CAR IS OFF THE NEEDLE IS SITTING ON THE LITTLE NEEDLE HOLDER.. AND WHEN I TURN THE CAR ON THE NEEDLE BARELY MOVES TO THE FIRST WHITE LINE..IT STAYS THERE AT ALL TIME WITH ACCELERATION OR WITHOUT.. ONCE THE CAR IS TURNED OFF IT WILL JUST FALL BACK DOWN TO THE NEEDLE HOLDER.. SO DO I HAVE TO PUT RESISTORS ON THAT LITTLE ELECTRONIC BOARD THAT CONTROLS THE NEEDLE OR WOULD IT BE SOMETHING ELSE??