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 MANUALSMAZDA1991626 DX, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSIDLE SPEED CONTROL (ISC) SYSTEMAIR VALVE
1991 Mazda 626 DX, Automatic
Air Valve
1991 Mazda 626 DX, AutomaticSECTION Air Valve
- Remove air valve from throttle body. Blow air through valve from port "A" and ensure air comes out port "B" when valve is cold. See Figure .
- Place air valve in hot water (greater than 176°F or 80°C) for one minute. Blow air through valve from port "A". No air should come out of port "B". Replace valve if not functioning as specified.
RENDER: 1.0x
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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.