Holley Sniper Issues

I would almost bet this is the old "IGN1 / IGN2" issue. CHECK that the system is actually getting power BOTH with the key in "run" and with the key in "start."

IGN1 is the "run" power from the key which feeds through the bulkhead and powers underhood loads like the ballast resistor, alternator field, regulator, electric choke if used, etc etc. THIS POWER GOES DEAD during "crank" or "start."

IGN2 is (usually brown) the resistor bypass circuit which goes from the key, through the bulkhead, to the coil + side of the ballast. IF YOU are using a non ballast system you MUST jumper the "run" and the "bypass" together to get power both in start and run

One thing you can do temporarily is jumper power direct to the EFI and trigger wire until you get things worked out. (fired). Also check that you have spark