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.
1985 Mazda 626 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Duty Solenoid Valve
- Remove air cleaner. Disconnect duty solenoid vacuum hose from EGR control valve. Blow through solenoid vent vacuum hose (hose to air cleaner) and verify that air exhausts through hose disconnected from EGR valve.
- Unplug solenoid valve electrical connector. Apply battery voltage to Brown/Red wire terminal of connector, and connect Black/White terminal to ground. See Fig 1 .
- Blow air through vent vacuum hose. Verify that solenoid valve is now closed. Disconnect vacuum hose between duty solenoid and intake manifold, at manifold. Blow air through intake manifold vacuum hose. Verify that air does not pass through valve.
- Apply battery voltage to Brown/White wire terminal of connector and hook jumper wire from other Black/White terminal to ground. See Fig 1 . Blow air through manifold vacuum hose: Air should exhaust out vent tube.
Factory Service Tools
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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.
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