Ignition Timing

1. Remove the air filter assembly.


2. Set the parking brake. Shift automatic transmissions to PARK and manual transmissions to the NEUTRAL position.


3. With the ignition switch OFF, connect an ignition timing light to the number (1) spark plug and a tachometer to the coil negative terminal (A).




Six-Cylinder Firing Order




4. Disconnect the 4-in. and 10-in. Hg vacuum switch assembly wire connector (located adjacent to the vacuum switch assembly).

5. Disconnect and plug the distributor vacuum advance hose (C).


Start the engine.


Increase the engine speed to 1600 rpm and check the ignition timing. If necessary, adjust the timing to the specification listed on the Emission Control Information label.

Tighten the distributor hold-down clamp and verify that the ignition timing is correct.


Turn the ignition switch OFF and remove the timing light.


Connect the hose to the distributor vacuum advance mechanism. Connect the wire connector to the vacuum switch assembly.