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 MANUALSSUBARU1998FORESTER L, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGIDLE SPEED & IGNITION TIMING
1998 Subaru Forester L, Standard
Idle Speed & Ignition Timing
1998 Subaru Forester L, StandardSECTION Idle Speed & Ignition Timing
Verify idle speed and ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING tables. For adjustment procedures, see ADJUSTMENTS article in this section.
IDLE SPEED SPECIFICATIONS
| Application | RPM | |
|---|---|---|
| Forester | ||
| With A/C Off | 650-750 | |
| With A/C On | 800-900 | |
| Impreza | ||
| With A/C Off | 600-800 | |
| With A/C On | 750-850 | |
| Legacy | ||
| With A/C Off | 600-800 | |
| With A/C On | 800-900 | |
IGNITION TIMING (Degrees BTDC @ RPM) (1)
| Application | Auto. Trans. | Man. Trans. | |||
|---|---|---|---|---|---|
| Forester | 15 @ 700 | 15 @ 700 | |||
| Impreza & Legacy | |||||
| 2.2L | 20 @ 700 | 14 @ 700 | |||
| 2.5L | 15 @ 700 | 15 @ 700 | |||
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RENDER: 1.0x
NO RELATED
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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.