Cleaning & Inspection
- Thoroughly clean parts in carburetor cleaner. Dry components with compressed air. Blow out all passages with compressed air. Do not use wire or pointed metal objects for cleaning. Inspect air horn, main body and throttle body for cracks and breakage.
- Inspect choke and throttle shafts for wear. Check all jets and air bleeds for open passages. Inspect needle and seat for wear. Inspect float and accelerator pump cup for damage. Replace all damaged components.
- Inspect vacuum diaphragm for damage. Inspect idle mixture screw for wear or burrs. Apply battery voltage to solenoids and note valve stem movement. Stem movement should exist.
- Check choke thermostat cover by connecting an ohmmeter to wire coupler and heater ground. If there is no continuity, replace thermostat cover.
- Check A/F solenoid valve operation by connecting battery voltage to solenoid connector. Check that air will flow through A/F solenoid in direction indicated with battery voltage applied. See Fig 1
. The A/F solenoid is not serviceable. Air horn assembly must be replaced if A/F solenoid is defective.
Courtesy of MAZDA MOTORS CORP.