I am having some trouble with my tach. It's not giving the right readings for me. I will show 7700-7800 on the tach while doing my speed run, but i know the sled is reving much higher by the sound of the motor. Also when i check my max rpms it will show up around 8000-8100. This what i tried... Another tach out of a firecat pulling apart all the connections and trying the sled that way and still same thing. Any thoughts or tips would be great.