Base Idle Speed

NOTE: Check ignition timing and valve clearances before making engine idle adjustment.





BASE IDLE SPEED ADJUSTMENT
- Set parking brake and block drive wheels.
- Place transmission in neutral.
- Initial preparation:
- Engine at normal operating temperature.
- Choke open.
- A/C off.
- Air cleaner installed.
- Distributor vacuum line, canister purge line, and EGR vacuum lines disconnected and plugged.
- Idle compensator vacuum lined closed by bending rubber hose.
- Adjust throttle adjust screw to specification. Specifications
- If A/C is installed:
- Turn A/C "ON", "Max COLD", blower on "HIGH".
- Open the throttle to approximately 1/3 and allow the throttle to close. This allows the speed-up solenoid to reach full travel.
- Adjust idle speed-up controller to base idle specification. Specifications