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 Control Valves
The air control valves are part of the air injection system. They help govern flow of secondary air to reed valves in air cleaner.
The No. 1 air control valve controls flow of secondary air to reed valve "A" according to intake manifold vacuum. If also supplies air when 3-way solenoid valve is on.
The No. 2 air control valve (Federal models only) is used in conjunction with No. 1 valve to control air flow to reed valve "A". No. 2 air control valve is vacuum actuated. The vacuum signal is controlled by an ACV solenoid valve which in turn is governed by the ECU.
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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