Fast Idle Check/Adjust
- Set parking brake. Ensure all accessories are off and transmission is in Neutral. Ensure ignition timing, idle speed and mixture are correct and engine is at normal operating temperature.
- Check that float level is at correct level in sight glass on carburetor and choke valve is fully open. Connect tachometer to proper terminals. See Fig 1.
- Remove air cleaner. Disconnect and plug the Mixture Control (MC), Hot Air Intake (HAI), choke opener and EGR valve hoses. See Fig 2.
- Hold throttle valve slightly open. Push choke valve closed and release throttle valve. Ensure fast idle cam is on the highest step. Start engine without depressing the accelerator.
- Check and adjust fast idle to specification by turning fast idle adjusting screw. See FAST IDLE SPEED SPECIFICATION table. Reconnect hoses.
FAST IDLE SPEED SPECIFICATION
| Application | RPM |
|---|---|
| Federal | 3000 |
| Calif. | 2600 |