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
EGR Control Valve
- Bring engine to operating temperature and remove air cleaner. Plug hoses of idle compensator, thermo sensor and reed valves. Disconnect vacuum hose to EGR control valve and connect hand-operated vacuum pump to valve.
- Start engine and let idle. Gradually apply vacuum to valve. Engine should start to idle rough or stall when vacuum exceeds 19.7 in Hg. Clean or replace valve if idle does not change.
Factory Service Tools
Use the Manual With the Right Hardware
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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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