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.
1981 Mazda GLC BaseFACTORY OEM SERVICE PROCEDURE
Air By-Pass Valve
- Disconnect air by-pass valve-to- "T" fitting hose (air by-pass valve-to-air control valve on 626) from air by-pass valve. Start engine and run at idle. Place finger over air by-pass valve outlet and make sure air is escaping.
- Increase engine speed and quickly release accelerator. Air should stop flowing for a few seconds. If air does not flow out or air flow lasts for more than 3 seconds, replace air by-pass valve.
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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