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.
Pulse Air Injection System: Operation
Main reed valve is actuated by diaphragm movement, caused by pressure pulsations generated by piston motion in No. 3 cylinder crankcase (sealed by a seal cover). A small hole in seal cover discharges engine oil and blow-by gas. Sub reed valve is actuated by exhaust vacuum generated from pulsations in exhaust system between front and rear catalytic converters.
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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