Ignition Timing: Adjustments

NOTE: Check curb idle speed before proceding to the following procedures.

1. Place transmission in neutral and turn off all lights and accessories.
2. Connect timing light to number 1 cylinder. Refer to timing light manufacturer's instructions for proper connecting procedures.
3. Start engine and allow to warm up to normal operating temperature.

Coolant Temperature Sensor:

4. Disconnect coolant temperature sensor electrical connector. The CHECK ENGINE lamp on the instrument panel should illuminate once this sensor has been disconnected.

Distributor Hold-Down:

Timing Scale and Magnetic Timing Probe Receptacle:

5. Check timing by pointing timing light at the front crankshaft pulley. If timing is within 2~ of specifications do not adjust. If timing is incorrect, loosen distributor hold-down bolt and rotate distributor housing until correct timing specification is obtained.
6. Tighten distributor hold-down bolt, and recheck timing. Reconnect coolant temperature sensor electrical connector, and erase any fault codes that may have been set.
7. Recheck idle rpm.
NOTE: There is an additional socket next to the timing scale, it is a socket for a magnetic timing probe. Do not set the timing through this socket with a standard timing light. This socket is positioned 10 degrees ATDC and will yield inaccurate timing specifications if used with a standard timing light.