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.
Air Injection System: Operation: Notes
When the air injection system is operating, exhaust gases in the exhaust manifold are transmitted to the air suction valve through an air suction pipe.
When negative pressure from exhaust pulsation reaches suction valve, reeds in suction valve are drawn open and secondary (fresh) air from the air cleaner is drawn into exhaust passage.
When positive pressure is present in exhaust, reeds are closed to prevent reverse flow of exhaust gas.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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