Ignition Timing: Adjustments
IGNITION TIMING ADJUSTMENT1. The vehicle should be prepared as follows before the inspection and adjustment.
- Engine coolant temperature: 85 - 95°C (185 - 205°F)
- Lights, electric, cooling fan, and accessories: OFF
- Steering wheel: Neutral position
- Transaxle: Neutral (N or P for A/T)
How To Use Connector:
2. Insert a paper clip from wire side of the connector, and connect a tachometer to the paper clip.
Timing Connector:
CAUTION: The paper clip should be inserted as shown in the illustration.
3. Connect a timing light.
4. Start and run the engine at curb idle speed.
5. Check curb idle speed. Curb idle speed: 750 +/- 100 rpm
6. Turn off the ignition switch.
Ignition Timing Adjustment Connector:
7. Connect a jumper wire to the terminal for ignition timing adjustment, and ground it.
NOTE: Basic ignition timing is obtained by grounding the ignition timing adjustment terminal.
8. Start and run the engine at curb idle speed.
9. Check basic ignition timing and adjust if necessary. Basic ignition timing: 5°BTDC +/- 2°.
10. It not within the standard value range, loosen the distributor mounting nut and adjust by turning the distributor. Turning it counterclockwise retards timing, and clockwise advances it.
11. After adjustment, tighten the mounting nut while using care not to move the distributor.
12. Stop the engine.
13. Disconnect the lead wire connected at step 7.
14. Start and run the engine at curb idle speed.
15. Check to be sure that the idling ignition timing is the correct timing. Actual ignition timing: Approx. 1O°BTDC.
NOTE:
1. Ignition timing is variable within about +/- 7°, even under normal operating conditions.
2. And it is automatically further advanced by about 5° from 1O°BTDC at higher altitudes.