Holley sniper EFI motor suddenly revving uncontrollably when I blip the throttle

I have a vacuum port on the intake. I got the correct sized hose and stuck it in there. Then with a cold engine I blew smoke into the vacuum port. the only place the smoke came out was the top of the Throttle body (engine off). Do I need to do this again with the motor up to temperature? Can you tell I've never done a smoke test before?