Automatic Electric Choke
- Bring engine to normal operating temperature and turn off engine. Remove air cleaner and plug vacuum hoses to air cleaner. Check all vacuum hoses, solenoids and choke wires for proper connections. Be sure all linkage operates freely.
- Be sure choke cap is properly aligned with index mark. Choke plates should be fully open. If not, disconnect electric choke lead from cap terminal and connect to test light. Ground second test light lead. With engine running, if light does not light, suspect faulty alternator or open circuit in choke lead. If light glows, replace choke cap.
- Hold throttle 1/4 open and move choke plates to closed position. Release plates. They should return to fully open position. If not, clean or repair choke system.
- Use a Rotunda Choke Tester (14-0206) or similar tool to cool the choke bi-metal coil. Hold throttle open and insert tester into choke housing opening for fast idle screw. Apply cool air for 8 minutes, removing tester for 10 seconds every 2 minutes. Choke plates should seat lightly. If not seated by 8 minutes, clean and repair system.
- Hold choke plates 1/4 open and remove tester. Allow throttle to close. Choke plates should remain partially open and throttle will be in kickdown position. Without touching throttle, start and run engine. Open throttle momentarily and then release it. Choke plates should be vertical and engine speed should drop to normal idle. If not, check for binding parts, broken torsion spring, or replace electric choke cap unit.
- Turn off engine, remove test equipment and reinstall all components.