Idle Speed: Adjustments
Inspection and Adjustment1. Start engine and warm-up to normal operating temperature; the cooling fan will come on.
2. Connect a tachometer.
3. Check idle speed with the headlights, heater blower, rear window defroster, cooling fan, and air conditioner off.
NOTE: To prevent the idle control system from operating pinch the vacuum hose # 10.
Idle speed should be: 750 ± 50 rpm
4. Adjust the idle speed, if necessary, by turning the idle adjusting screw.
5. If idle speed cannot be adjusted by turning the idle adjusting screw, check the fast idle valve.
6. Check the idle controller boosted speed with the A/C on.
Idle speed should be: 750 ± 50 rpm
7. Adjust the idle speed, if necessary, by turning adjusting screw B.