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.
1987 Mazda B2200 Base, 2D PickupFACTORY OEM SERVICE PROCEDURE
EGR Control Valve
- Warm engine to normal operating temperature and run engine at idle speed. Disconnect EGR control valve vacuum hose and plug hose.
- Ensure engine idles smoothly. If engine does not idle smoothly, clean exhaust gas passage in EGR valve or replace EGR valve. Before replacing EGR valve, check intake air and control systems.
- Connect a vacuum pump and apply 1.6-2.4 in. Hg to EGR valve. Ensure engine idles rough or stalls at greater than specified vacuum. If engine does not run rough or stall, replace EGR valve or check EGR passage for blockage.
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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