I am trying to set my cps sensor and the groove and the machined hole are not lining up when in the head. Gear has not been changed to the best of my knowledge. Is it possible for the gear to be installed 180 opposite? When installed the signal rotor is one tooth off in either direction cannot get it to line up. one tooth back and it barely runs, one tooth forward and has a miss at rpm. the only way to get it perfect is to turn the exhaust cam forward one full tooth. Please help.