I have no spark at all in my SDS EM4-E
the sdsem4-e is in a 92 Corvette these are the things I checked. Checked MSD and coil by removing the cap with coil in it put spark plug wire on rotor contact in cap and a grounded spark plug in the other end of plug wiredisconnected MSD white wire from SDS blue wire grounded white wire from MSD result was plenty of blue spark even with the ground part of the plug that is normally moved to gap opened to about 1/4 of an inch removed plug wire from cap re-assembled it re-connected the blue and white wire with plug wire off the engine with a grounded spark plug in it cranked the engine result no spark checked continuity on blue wire from blue SDS wire white MSD wire connection to pin 11 at SDS main harness result was perfect continuity disconnected sds took top off nothing looked burnt or out of place re- assembled and re-installed. Checked hall sensor by watching display screen while rotating the motor by hand result the display said magnet seen at the same time I heard the injectors click. Put a noid light in #6 injector cranked the engine the noid light pulsed in a good sequence with the engine rotation. I have fuel pressure 47psi the battery is fully charged. in main harness I have continuity to ground at the battery at pins 1-18-13. I don't know what else to check I have been thru troubleshooting but can't anything that might help