Ignition Timing: Adjustments

Ignition Timing

1. Refer to the Vehicle Emission Control Information label located on the radiator support. Follow all instructions on the label.
2. Refer to the Throttle Body Injection for timing information for engine equipped with TBI.
3. With the engine control switch off, connect the pick-up lead of a timing light to the number 1 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 wire between the boot and the wire. Connect the timing light power leads according to the manufacturer's instructions.
4. Disconnect the vacuum hose from the distributor if so equipped.






5. Start the engine and aim the timing light at the timing mark. The line on the balancer or pulley will line up at 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, slowly rotate the distributor until the line indicates the correct timing.
6. Turn off the engine and remove the timing light. Reconnect the number 1 spark plug wire, if removed.
7. Connect the vacuum hose to the distributor if so equipped.