Ignition Timing Adjustment

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 engine.
3. Connect a tachometer to the negative (-) terminal on the ignition coil.
4. Start the engine and check the curb idle speed setting.

Curb Idle Speed: 850 ± 100 RPM

Fig. 51 Grounding Ignition Timing Adjustment Terminal:

5. Stop the engine and ground the ignition timing adjusting terminal with a jumper wire. Fig. 51
6. Start the engine and check the ignition timing at idle speed.

Base Ignition Timing: 10 ± 2° BTDC

Fig. 52 Adjusting Ignition Distributor:

7. If not as specified, loosen the distributor hold down nut and rotate the housing until the marks align, Fig. 52. Rotating the distributor to the right retards timing and to the left advances timing.
8. Tighten the hold down nut and stop the engine.
9. Disconnect the jumper wire from the ignition timing adjusting terminal.
10. Start the engine and check the idle advance timing at idle speed.

Idle Advance Timing: 10 - 15° BTDC

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