<VV> Vacuum advance

FrankDuVal corvairduval at cox.net
Thu Oct 22 00:55:54 EDT 2020

Have you checked the point gap? They typically close up as the rubbing 
block wears, or the shaft bushing wears.

With the vacuum hose disconnected, the point plate stops moving, so, 
there is the possibility of the points plate pivot wearing out and 
causing 1. erratic grounding of the points. 2. erratic advance. 3. 
varying gap.

Point plates can be rebuilt.

Frank DuVal

On 10/21/2020 10:06 PM, Richard via VirtualVairs wrote:
> I enjoyed driving my 66 convertible to town, and no farther. My fears were realized when all of a sudden it started sputtering at high rpm (power glide). I fad Dave Sigler rebuild the carbs, so c I eliminated that as a problem (the guy us very talented). Now, when I take off the vacuum hose off the distributor, it rubs better at high rpm.  Even though I can see the vacuum advance moving back and forth as the rpm changes, the engine still runs better with the horse disconnected.  Bad points? Bad vacuum advance? Bad timing?

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