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Home >> Checker >> 1966 >> Marathon Base, Not Available, 5.3L Eng, Not Available Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> ROCHESTER 4GC 4-Barrel >> Adjustment >> Fast Idle Setting >> "On Engine" Adjustment (All Models)

"On Engine" Adjustment (All Models)

With engine at normal operating temperature, rotate fast idle cam so that fast idle screw is on specified stem of cam (see "Specifications "). Start engine and adjust fast idle screw for correct engine speed as shown in specifications.