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.
MAZDA Air Injection System (Piston Engines): Description
Mazda Air Injection System consists of an air pump, an anti-afterburn valve, a check valve, an air distribution manifold with a nozzle for each cylinder exhaust port, a vacuum sensing hose, and air supply hoses connecting the system. 1800 models have a separate air cleaner for the air pump, while all other models use the carburetor air cleaner. 616 models also use an air by-pass valve in the air injection system. Other items are also used for emission control as follows:- an air cut valve is used on all models, 1200 & 616 models use a coasting richer device. Dual point distributors are also used on all models except non-California 616 models and California 616 manual transmission models.
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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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