Ignition Timing: Adjustments

1. Refer to the tune-up label located in the engine compartment. Follow all instructions on the label.
2. With ignition OFF, connect the pick-up lead of timing light to the number one spark plug. Use a jumper lead between the wire and plug or an inductive type pick-up. DO NOT pierce the wire or attempt to insert a probe between the boot and the wire. Connect the timing light power leads according to manufacturers' instructions.

NOTICE: Do not time engine on seven cylinders as the unburned fuel could cause damage to the catalytic converter.

ALDL Connector:

3. Jumper pins A & B together at the Assembly Line Diagnostic Link (ALDL) connector while not in diagnostic display.

Magnetic Timing Probe Hole:

4. Start the engine and aim the timing light at the timing mark. The line on the pulley will line up at the timing mark. If a change is necessary, loosen the distributor hold-down clamp nut with special tool J 29791 at the base of the distributor. While observing the mark with the timing light, slightly rotate the distributor until the line indicates the correct timing. Tighten the hold-down nut and re-check the timing.
5. Turn OFF the engine and remove the timing light. Reconnect the number one spark plug wire, if removed.
6. Remove jumper from ALDL connector.