Good afternoon Spud, Ray and i are having issues with our Autometer Sport Comp Tach, It works when you wing the motor , tach will tach up when reving the motor, it does not want to hola an idle, when motor is at idle the needle just sits around 500rpm only until you hit the throttle , hard to say where the motor is really at rpm wise, we checked all the wires and wired it to the diagram that came with our pulse generator , it seems to be all ok , wired to diagram, any sugestions that may help us, we have our last race this weekend at woodburn, weather permitting, Thanks Spud, Pat Johnson ,Tillamook.