[H. L. Chauvin]

Humble Opinion:

Also sounds like that mentioned above, i.e., not enough fuel in the fuel mixture getting to the combustion chamber as you witnessed by opening the GAV.

With all due respect, to all involved, for many Model A owners, sometimes, (not all of the time), the term "Carburetor Rebuilt" is a similar term to that used in an ebay Ad for a "Ground up Model A Restoration".

This "Carburetor Rebuilt" phrase has infinite meanings to responsible, professional carburetor rebuilders who provide work involving anywhere from meticously verifying "all" orifice opening flow through "all" jets, to just cleaning out the carburetor bowl & painting it black.

Also, could you possibly have:

1. A vacuum line for a vacuum wiper that may be leaking & making the fuel mixture have more air & less gas; or,

2. A warped pot metal Tillotston or Marvel carburetor leaking between the very critical carburetor halves; or,

3. Leaking at the very critical carburetor/intake manifold flange joint.

4. An 83 year old gas tank with minor debris that constantly flows out with the fuel & constantly impedes the flow of fuel throught the carburetor jets.

One can clean the carburetor jets once a week for the next 15 years & totally wear out all of the carburetor bolts, & get towed back home a few times, or use common sense, first clean the gas tank, & then live happily ever after for the next 100,000 miles.

Sincerely hope this helps your further investigation .