Ignition Timing: Testing and Inspection

Ignition Timing
INSPECTION

CAUTION: After warming-up, engine becomes very hot. Be careful not to burn yourself at measurement.

METHOD WITH SUBARU SELECT MONITOR
1. Before checking the ignition timing, check the following item:
1. Check the air cleaner element is free from clogging, spark plugs are in good condition, and hoses are connected properly.
2. Check the malfunction indicator light does not illuminate.
2. Warm up the engine.
3. Read the ignition timing using Subaru Select Monitor.
Ignition timing [BTDC/rpm]: 15 degrees ± 8 degrees/650
If the timing is not correct, check the ignition control system.

METHOD WITH TIMING LIGHT
1. Before checking the ignition timing, check the following item:
1. Check the air cleaner element is free from clogging, spark plugs are in good condition, and hoses are connected properly.
2. Check the malfunction indicator light does not illuminate.
2. Warm up the engine.
3. Stop the engine, and turn the ignition switch to OFF.
4. Remove the air cleaner case.
5. Connect the timing light to the power wire of #1 ignition coil.
6. Install the air cleaner case.
7. Start the engine, aim the timing light to the crank pulley, and check the ignition timing by the crank pulley indicator.
Ignition timing [BTDC/rpm]: 15 degrees ± 8 degrees/650
If the timing is not correct, check the ignition control system.