Ignition Timing Adjustment

ADJUSTMENT CONDITIONS:
Coolant temperature, 170°F-190°F.
All accessories, Off.
Transmission, N (Neutral).
Parking Brake, ON.

Tachometer Hookup:

Insert a paper clip (from harness side) in the one pin connector located between the noise filter and the ignition coil, and connect the tachometer.

Tachometer Connector Usage:

Caution The connector should not be separated.
The paper clip should be inserted along the terminal surface.
The paper clip should be inserted at the correct side. If it is inserted incorrectly, the paper clip may become caught and cannot be removed.

1. Connect timing light.

Timing Connector:

2. With the engine stopped, connect a lead wire, between the terminal for ignition timing adjustment (located in the engine compartment) and ground.
3. Start and run the engine at curb idle speed.
Standard value
Curb idle speed....750 ± 100 rpm

Ignition Timing Mark:

4. Check base ignition timing and adjust if necessary.
Standard value
Base Timing....5° ± 2°BTDC

5. If the timing is incorrect, loosen the distributor's holding nut, and then turn the distributor until the timing is correct.
NOTE: The ignition timing will be advanced if the distributor is turned to the left and retarded if it is turned to the right.

6. After adjustment, securely tighten holding nut.
CAUTION: Be careful, when tightening the nut, that the distributor does not move.

7. Stop the engine.
8. Disconnect the lead wire connected at step 2.
9. Start and run the engine at curb idle speed.
10. Check to be sure that the idle ignition timing is correct.
Standard value
Idle Timing....10°BTDC