Ignition Timing: Adjustments

1. Confirm initial inspection conditions:
a. Engine coolant temperature is 185 - 205°F.
b. Lights, cooling fan and all accessories are OFF.
c. Transaxle is in neutral or park.
d. Steering wheel is in straight-ahead position, (on vehicles with power steering).
2. Connect a strobe timing light to the #1 ignition cable (R.H.).

Tachometer Connection:

3. Connect the pick-up lead of a tachometer to the connector.
4. Start the engine and check the curb idle speed setting. (If not correct, refer to adjustment procedure.) See IDLE SPEED
Curb Idle Speed:
750 ± 100 RPM

Grounding Ignition Timing Adjustment Connector:

5. Stop the engine and ground the terminal for ignition timing adjustment with a jumper wire.

Fig. 50 Checking Ignition Timing:

6. Start the engine and check the ignition timing at idle speed.
Base Ignition Timing:
5° BTDC

Adjusting Ignition Timing:

7. If not as specified, loosen the crank angle sensor hold down nut and rotate the module until the timing marks align.

Note: Rotating the sensor clockwise advances timing.

8. Tighten the hold down nut and stop the engine.
Torque Specification
7 - 9 Ft lbs (10 - 12 Nm)

9. Disconnect the jumper wire from the terminal for ignition timing adjustment.
10. Start the engine and check the idle advance timing at idle speed.
Idle Advance Timing:
10° BTDC

11. This timing specification is controlled by the ECM and is NOT adjustable.
12. Disconnect and remove the tachometer and timing light from the engine.