Written by GM, this is a reprint of the book that Buick mechanics used to diagnose Quadrajet 4-barrel carburetors. Inside you will find a handy chart with trouble symptoms and check points, along with instructions for adjustments to correct problems. Find out about adjustments to float level, pump, idle vent, automatic choke, choke rod, unloader, fast idle, vacuum brake, secondary metering rod, air valve, air valve lockout, air valve spring, and dash pot. Check for plugs, leaks, sticking, full operation, and dirt in the float system, power piston, air valve dash pot, throttle valves, gaskets, idle restrictions, vacuum, chocke valve opening, intake manifold, pump system, idle stator switch, and idle compensator valve.
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