Ignition Timing: Adjustments

IGNITION TIMING
- Place transmission in "PARK" or "NEUTRAL", A/C and heater in "OFF" position.
- Connect an inductive timing light to number one cylinder.

Component Locations - Front Of Engine TFI-IV Ignition:

- Disconnect the single wire in-line Spark Output (SPOUT) connecter near the distributor.

NOTE: A shorting plug may be used in place of a single wire connector.

- Start the engine and allow it to warm up to operating temperature.

Automatic Transmission:

Manual Transmission:

- With engine at the specified rpm, check/adjust initial timing to specification. Specifications
- Reconnect single wire in-line SPOUT connector and check timing advance to verify distributor is advancing beyond the initial setting, if not refer to Testing and Inspection. Testing and Inspection
- Remove inductive timing light.

NOTE: To set timing correctly, a remote starter should not be used. Use the ignition key only to start the vehicle. Disconnecting the start wire at the starter relay will cause Ignition Control Module (ICM) to revert to start mode timing after the vehicle is started. Reconnecting the start wire after the vehicle is running will not correct the timing.