Autosport Labs

Ok... regarding the EDIS4 by itself... according to the installation guide: Proper VR sensor polarity = spark at plugs Backwards VR sensor polarity = no spark at plugs So if I have spark at the plugs then the Crank Position Sensor is not wired backwards, correct? Further, if I have spark at the plug...

Working with a Mazda MX5 motor, have a Megajolt/EDIS-4 ignition and need an RPM signal for the Sniper fuel injection system. The Sniper wants either a coil negative signal (yellow wire), points positive signal (white wire), or signal from an MSD box (purple/green wire pair). Question is, anyone know...