Ignition Timing: Testing and Inspection

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Test 1, Spark Timing:

TEST 1

Test 2, Spark Timing:

TEST 2

TEST 3

1. Place transmission in NEUTRAL or PARK with Air Conditioner/Heater in OFF position.
2. Connect an inductive timing light.
3. Disconnect the single wire in-line Spark Output (SPOUT) connector or remove the shorting bar from the double wire spout connector.
4. Start engine and allow to reach operating temperature. With engine at timing rpm, check or adjust initial timing to specification.
5. Reconnect single wire in-line spout connector or reinstall the shorting bar on the double wire spout connector. Check timing advance to verify distributor is advancing beyond the initial setting. If it is not, refer to Computed Timing Check.