[rocketraider]

The small vac line goes from the PCV valve to the back of the carb, or some years there's a vacuum port on the intake. It will affect it some because the PCV relies on that small amount of vacuum to help lift the flap off its seat as well as pulling some of the blowby gas back into the engine for reburn. Without it, the engine is not getting enough fresh air in via the aircleaner tube, and not allowing vapors to be sucked out of the valve cover and into the carb via that same tube.

The damn thing is just weird, but it apparently worked for a couple years until they decided to use a more conventional PCV system.

Hope hooking the PCV vacuum back up helps. It sure can't hurt.