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)MAINTENANCEPROCEDURESMAINTENANCE INFORMATIONCAUTIONS & WARNINGSCATALYTIC CONVERTER
1991 Volvo 940 Turbo, 4D Sedan, AW71
Catalytic Converter
1991 Volvo 940 Turbo, 4D Sedan, AW71SECTION Catalytic Converter
CAUTION:
Continued operation of vehicle with a severe malfunction could cause converter to overheat, resulting in possible damage to converter and vehicle.
Any modification to the exhaust system on turbo models, which reduces exhaust backpressure, will lead to lean fuel mixtures and excessive spark advance. This could cause serious engine damage.
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.