Newbie here, first time posting. I'm building a roadster that's in the go cart stage. I need help with my tach, I have tried everything that I know of. Here's my setup, 3rd Gen Coyote, Tremec TKX, Ford Performance Control Pack, Classic Instruments (Auto Cross Series-Gray) I have a MSD 8913 Tach Adapter ( I was told this is what I Needed). I can't get signal, I have tapped into the coil, I have tapped into the purple wire that it tells you to in the manual. ANY help would be very much appreciated!