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 MANUALSVOLVO1991940 TURBO, 4D SEDAN, AW71REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSIGNITION TIMING

1991 Volvo 940 Turbo, 4D Sedan, AW71

Ignition Timing

1991 Volvo 940 Turbo, 4D Sedan, AW71SECTION Ignition Timing

Ignition timing is computer-controlled and is not adjustable.

IGNITION TIMING (Degrees BTDC @ RPM)

Application

⁽¹⁾ Timing

Except 940 GLE

12 @ 725-825

940 GLE

15 @ 800-900

⁽¹⁾	Ignition timing is computer-controlled and is not adjustable.

Fig 1: 4-Cylinder Firing Order & Distributor Rotation

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.