Ignition Timing: Adjustments

Before checking or adjusting the ignition timing, be sure:
Coolant temperature has reached 85-95°C (185 - 205°F)
Lights and all accessories are Off.
Transmission is in Neutral (N) or Park (P).
Parking Brake is applied

1. Connect tachometer and timing light. Refer to manufacturers' instructions.
2. Start engine and run at curb idle. Refer to SPECIFICATIONS.

Distributor Vacuum Chambers:

3. When checking the BASIC ignition timing at high altitude (higher than 1,200 m / 3,900 ft), disconnect the white striped vacuum hose from the sub-vacuum chamber of the distributor and plug the hose end.
4. Check BASIC ignition timing and adjust if necessary. Refer to SPECIFICATIONS.

Basic Ignition Timing Adjustment:

5. To adjust ignition timing, loosen distributor mounting nut and turn distributor housing.
6. After adjustment, securely tighten mounting nut.
7. When checking at high altitude, after connecting the vacuum hose removed in step 3, check to ensure that ignition timing advances to ACTUAL ignition timing. Refer to SPECIFICATIONS.