Vacuum advance on 318

DQ81 said

There's gotta be some vacuum otherwise there is no air. If it made no difference you wouldn't have to remove the vac-hose to set initial timing.

I'm doing something wrong or somethings wrong: there's only one port, not much to do wrong there.

Duct tape = PO

Cheers

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a vacuum is void of air (or atmosphere). on my engines, there is no pull on most ports above the throttle plates.
easy to find out. hook up a vacuum gauge to the port yor using now, let it idle and see how much its pullin.
nutter possibility is that the idle speed is set to high, exposing the vacuum channel to that port.
now before you say "nope". check to see if the mixture screws are cranked almost all the way seated.
whats a "PO"
even if the vac.diaphram is blown, it won't kill the engine. unless its way outta tune.
cheers