Metering Rod
- Remove air horn and gasket. Hold throttle valve wide open. Push down on metering rod against spring tension. See Fig 1. Slide metering rod out of slot in holder and remove from main metering jet.
- Back out idle stop solenoid. Hold throttle valve in fully closed position. Press down on power piston. Swing metering rod holder over flat surface of bowl casting next to bore.
Courtesy of GENERAL MOTORS COMPANY
- Measure specified clearance between rod holder and carburetor surface. Measurement can be made using a drill or pin gauge. If adjustment is needed, gently bend holder arm up or down. Recheck clearance. Reassemble carburetor. Install new air horn-to-body gasket. Check for leaks.