Caution: In order to prevent possible personal injury from a moving vehicle or operating engine do the following before performing the checks:

The firing order is 1-8-4-3-6-5-7-2.

1. Put the IC system in the bypass mode by disconnecting the set timing connector (2). This is a single wire sealed connector that has a tan with black stripe lead. This connector breaks out of the engine wiring harness near the ECM (1).
2. With the ignition switch OFF, connect the pickup lead of the timing light to the number one spark plug. Use a jumper lead between the wire and plug or an inductive type pickup.
3. Do not pierce the wire or attempt to insert a wire between the boot and the wire. Connect the timing light power leads according to manufacturer's instructions.



4. Start the engine. Aim the timing light at the timing mark. The line on the balancer or pulley will line up at 0 degrees BTDC on the timing mark. If a change is necessary, loosen the distributor hold-down clamp bolt 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 bolt. Recheck the timing.
5. Turn OFF the engine. Remove the timing light. Reconnect the number one spark plug wire if removed.
6. Reconnect the Set Timing connector.