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 MANUALSSAAB1990900 S, 2D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGIDLE SPEED & IGNITION TIMING
1990 Saab 900 S, 2D Hatchback, Automatic
Idle Speed & Ignition Timing
1990 Saab 900 S, 2D Hatchback, AutomaticSECTION Idle Speed & Ignition Timing
Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see ADJUSTMENTS article.
IDLE SPEED SPECIFICATIONS
| Application | RPM |
|---|---|
| 900 Turbo | 800-900 |
| All Other Models | 775-925 |
IGNITION TIMING (Degrees BTDC @ RPM)
| Application | Specification | ||||
|---|---|---|---|---|---|
| 900 | (1) 20 @ 2000 | ||||
| 900S & 9000S | 14 @ 850 | ||||
| 900 Turbo & 9000 Turbo | (2) 16 @ 850 | ||||
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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.