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Home >> GMC >> 1978 >> Forward Control 5.7L Eng VIN L, Standard Trans >> Repair and Diagnosis >> Electrical >> Body Electrical >> Speed Control Systems - Automatic >> Adjustments >> Servo Unit
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Servo Unit

Adjust rod-to-carburetor making it as tight as possible without holding throttle open when carburetor is set at its lowest idle throttle position. When adjusting the rod, with engine stopped, manually set fast idle cam at its lowest step and rod so idle screw is not held off the cam.