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.
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HOMESERVICE MANUALSSUBARU2007FORESTER F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION TIMINGTESTING AND INSPECTION
2007 Subaru Forester F4-2.5L DOHC Turbo
Ignition Timing: Testing and Inspection
2007 Subaru Forester F4-2.5L DOHC TurboSECTION 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. Insert the cartridge to Subaru Select Monitor.
5. Connect the Subaru Select Monitor to data link connector.
6. Turn the ignition switch to ON and Subaru Select Monitor to ON.
7. Select (Each System Check) in Main Menu.
8. Select (Engine Control System) in Selection Menu.
9. Select (Current Data Display & Save) in Engine Control System Diagnosis.
10. Select (Data Display) in Data Display Menu.
11. Start the engine and check the ignition timing at idle speed.
Ignition timing [BTDC/rpm]:
17° ± 10°/700
If the timing is not correct, check the ignition control system. Refer to Engine 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. Insert the cartridge to Subaru Select Monitor.
5. Connect the Subaru Select Monitor to data link connector.
6. Turn the ignition switch to ON and Subaru Select Monitor to ON.
7. Select (Each System Check) in Main Menu.
8. Select (Engine Control System) in Selection Menu.
9. Select (Current Data Display & Save) in Engine Control System Diagnosis.
10. Select (Data Display) in Data Display Menu.
11. Start the engine and check the ignition timing at idle speed.
Ignition timing [BTDC/rpm]:
17° ± 10°/700
If the timing is not correct, check the ignition control system. Refer to Engine Control System.
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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.