Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Subaru Outback F4-2.5L SOHCFACTORY OEM SERVICE PROCEDURE
Ignition Timing: Testing and Inspection
Ignition Timing
INSPECTION
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) Connect the timing light to #1 cylinder spark plug cord, and then light the timing mark with the timing light.
5) Start the engine and check the ignition timing at idle speed as shown below.
Ignition timing [BTDC/rpm].
10°±8°/650 (MT Model)
15°±8°/700 (AT model)
If the timing is not correct, check the ignition control system.
INSPECTION
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) Connect the timing light to #1 cylinder spark plug cord, and then light the timing mark with the timing light.
5) Start the engine and check the ignition timing at idle speed as shown below.
Ignition timing [BTDC/rpm].
10°±8°/650 (MT Model)
15°±8°/700 (AT model)
If the timing is not correct, check the ignition control system.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.