Can I get help in diagnosing the voes? Was running great, now coughs sometimes, lower idle... What are the signs of voes going bad?

 

There are some good YouTube videos on how to them.

 

Sounds more like a intake/vacuum leak. The voes can go bad and cause a vacuum leak, but usually not. It goes bad when it no longer switches to the advance curve. It's just an electric switch activated by vacuum diaphragm pushing on it. They get old and resistance gets high in the switch. It can develop a leak, but not that common.

If the switch goes bad (with no leaks), you might not even notice that it is not switching curves.

I would check your vacuum lines first for a split in that. To see if a voes leaks, put a vacuum and gauge on the voes and see if it leaks vacuum (mity-vac works great for this). You can even connect a meter to the voes leads and read ohms when using the mity-vac to see the "health" of the switch (measure resistance while switching on and off).

More likely it is the intake to head O-ring seals or the carb to manifold seal. A cough usually means lean, and lean is usually caused by intake or carb leak, especially if everything was good and you changed nothing, then symptoms all of a sudden started.

 

Check the rubber tubing from the voes to carb, and rubber hose from the manifold to vacuum petcock.. Also intake manifold seals are coming due , due to age if they haven't already been done.