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 MANUALSSUBARU2002FORESTER BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURESIDLE SPEED & IGNITION TIMING
2002 Subaru Forester Base
Idle Speed & Ignition Timing
2002 Subaru Forester BaseSECTION Idle Speed & Ignition Timing
Ensure idle speed and ignition timing are set to specification. See IDLE SPEED SPECIFICATIONSΒ and IGNITION TIMING (DEGREES BTDC @ IDLE)Β tables.
IDLE SPEED SPECIFICATIONS
| Application | RPM | ||
|---|---|---|---|
| 2.0L | |||
| With A/C Off | 750 +/- 100 | ||
| With A/C On | |||
| A/T | 825 +/- 150 | ||
| M/T | 800 +/- 150 | ||
| 2.5L | |||
| With A/C Off | |||
| A/T | 700 +/- 100 | ||
| M/T | 650 +/- 100 | ||
| With A/C On | 850 +/- 100 | ||
| 3.0L | |||
| With A/C Off | 600 +/- 50 | ||
| With A/C On | 700 +/- 50 | ||
IGNITION TIMING (DEGREES BTDC @ IDLE)
| Application | (1) Auto. Trans. | (1) Man. Trans. | ||||||
|---|---|---|---|---|---|---|---|---|
| 2.0L | 12 @ 700 RPM | 12 @ 750 RPM | ||||||
| 2.5L | 15 @ 700 RPM | 10 @ 650 RPM | ||||||
| 3.0L (2) | 10 @ 600 RPM | (3) | ||||||
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.