I need help with my switch. I'm having a problem with the RPM setting up. I don't know if the box is bad or something else is goin on. I hooked everything up the way it shows the white wire to #10 pin on the ecu and it is #1 for the cyl setup. but when I arm it and start it up the RPM it shows on the display is way off, I have all the wires hooked up except the gray wire. the yellow I have goin to the grounds but my main concern is the display of the rpm. Has anyone had this problem?

 

Which MSD. Digital or old chip style?

 

title says digital. im having a similar problem with mine, rpms show to be about 1/2 of actual rpm, i tried adjusting the "window" to compensate but it still didnt work, idk whats going on with it