Bouncing ammeter

Ok guys....I installed a Sniper EFI on my 360. Got her running and now when it's running the ammeter is bouncing from nothing (middle) to full right and back and forth. when first started it was not doing this but started after a few minutes. I have disconnected the ballast resistor from the system and wonder if that could have anything to do with it. Also, the wiring for the distributor is still there, but the box is unplugged (Put a Holley Hyperspark system on it.). Any Ideas?
Author: dewsky