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.
1990 Subaru XT 1.8 5FACTORY OEM SERVICE PROCEDURE
Idle Speed & Ignition Timing
Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see the ADJUSTMENTS article in the ENGINE PERFORMANCE Section.
IDLE SPEED SPECIFICATIONS
| Application | (1) RPM | |||
|---|---|---|---|---|
| Legacy | 600-800 | |||
| Loyale | ||||
| 1.8L TBI | 600-800 | |||
| 1.8L PFI | 700-900 | |||
| XT, XT6 | ||||
| Man. Trans. | 600-800 | |||
| Auto. Trans. | 700-900 | |||
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IGNITION TIMING SPECIFICATIONS (1)
| Application | Degrees BTDC @ RPM | |||
|---|---|---|---|---|
| Legacy | 20 @ 700 | |||
| Loyale | ||||
| 1.8L TBI | 20 @ 700 | |||
| 1.8L PFI | 20 @ 800 | |||
| XT, XT6 | ||||
| Man. Trans. | 20 @ 700 | |||
| Auto. Trans. | 20 @ 800 | |||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.