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 SPG, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSIGNITION TIMING
1990 Saab 900 SPG, Standard
Ignition Timing
1990 Saab 900 SPG, StandardSECTION Ignition Timing
NOTE:
9000 Turbo models are equipped with Distributorless Ignition System (DIS). Timing is not adjustable.
- 1) Connect tachometer and timing light. Disconnect and plug vacuum advance hose (if equipped). Place transmission in Neutral. Ensure throttle position sensor is closed.
- 2) With engine at normal operating temperature, check ignition timing at specified RPM. See IGNITION TIMING TABLE . Adjust ignition timing, if necessary, by loosening distributor hold-down bolt and turning distributor.
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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.