49-State

PROCEDURE

Base Timing Verification
1. Place the transmission in PARK or NEUTRAL, A/C and heater in OFF position.
2. Connect an inductive timing light, Rotunda 164-RO252 or equivalent.
3. Disconnect the single wire in-line SPOUT connector or remove the shorting bar from the double wire SPOUT connector.
4. Start engine and allow it to warm up to operating temperature. To set timing correctly,

NOTE: A remote starter should not be used to start vehicle.

5. Use the ignition key only to start the vehicle. Disconnecting the start wire at the starter relay will cause the 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.
5. With engine at timing RPM if specified, check/adjust initial timing to specification.
6. Reconnect the single in-line SPOUT connector or reinstall the shorting bar on the double wire SPOUT connector.

Advanced Timing Verification
Check Advanced timing while varying engine speed to verify distributor is advancing beyond the initial setting. If it is not, Refer to Powertrain Management/Testing and Inspection/Diagnostic Subroutines.
7.Remove test instruments.