Curb Idle
ADJUSTMENTS MUST BE PERFORMED IN THE FOLLOWING ORDER1. IGNITION TIMING
2. CURB IDLE SPEED
3. FAST IDLE SPEED
4. SOLE-VAC THROTTLE POSITIONER
1. Connect a tachometer to the ignition coil negative (TACH) terminal.
2. Start and allow the engine to warm up to normal operating temperature.
3. The choke and intake manifold heater must be off. These turn off as the engine coolant warms to approximately 160°F.
When adjusting the idle speed, place a manual transmission in NEUTRAL or an automatic transmission in DRIVE. Turn all accessories off. WARNING: SET THE PARKING BRAKE FIRMLY. DO NOT ACCELERATE THE ENGINE.
Sol-Vac Vacuum Actuator:
4. Disconnect and plug the vacuum hose from the Sole-Vac vacuum actuator.
5. Disconnect the Sole-Vac holding solenoid wire connector.
6. Increase the engine speed to above 1200 rpm for 3-5 seconds and allow the engine to return to curb idle speed.
Curb Idle Screw:
7. If not at the specified speed, adjust the carburetor curb (slow) idle speed adjustment screw to obtain the specified curb (slow) idle engine rpm.
8. Using a hand held vacuum pump, apply 10-15 in Hg vacuum to the vacuum actuator.
9. Increase the engine speed to above 1200 rpm for 3-5 seconds and allow the engine to return to curb idle speed.
Sole-Vac Actuator Screw:
10. With the Sole-Vac throttle positioner fully extended, turn the vacuum actuator adjustment screw on the throttle lever until the specified engine rpm is obtained.
11. Disconnect the vacuum source from the vacuum actuator.
12. With a jumper wire, apply battery voltage (12V) to energize the holding solenoid.
13. Hold the throttle open manually to allow the throttle positioner to fully extend.
NOTE: The throttle must be opened manually to allow the Sole-Vac throttle positioner to be fully extended.
14. If the holding solenoid idle speed is not within specification, adjust the Sole-Vac throttle positioner (hex head screw) to obtain the specified engine rpm.
15. Turn the engine OFF.
16. Remove the jumper wire from the Sole-Vac holding solenoid wire connector (if connected).
17. Connect the Sole-Vac holding solenoid wire connector (if disconnected).
18. Connect the original vacuum hose to the vacuum actuator.
19. Remove the tachometer.