Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
Rebuilt 4988S Not So Good.
Cliff Ruggles:
From light to heavy, orange, light blue, green, dark blue. The opening points are apprx 5-6, 6-7, 8-9, and 9-10" vacuum.
For most builds I use the light blue spring.....Cliff
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