Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Edelbrock Quadrajet 1904 idle speed screw non-functional

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Cliff Ruggles:
You don't need a rebuild "kit", not even sure anyone makes them.  Take it completely apart and clean things up, and look for worn components. 

If the parts look fine, no worn pins, shaft/lower bushing, etc, then polish the upper portion of the shaft and clean up the advance mechanism, weight, center cam, lube and reassemble.  I stock new springs and pins if they are worn.  Worn weight holes can be brazed up and re-drilled to the stock size if needed.

Vacuum test the VA and replace it if needed.

I provided a pick in another response of providing a positive stop for the advance.  Not an option on an HEI.....IMHO......

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