You would need to find a way to seal the hole from the excess air so that the engine does not stall. My neighbor does it somewhat that way, with the wand from the throttle body cleaner aerosol stuck into the vacuum line and sealed off. He squirts a little at a time. I really don't think he ends up with the intake getting cleaned up as well as the way I do it. With some experimentation this could be a viable alternative, but I know my system works.
