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 - CALIF: Operation
Filtered air is drawn from air cleaner by air pump and directed under pressure to air control valve. The No. 1 relief valve of air control valve diverts part of air pump air back to air pump when engine is operating under heavy load conditions and to the air cleaner at high engine RPM.
The No. 2 relief valve of air control valve regulates the amount of air injected, based upon intake manifold vacuum and coolant temperature. The air injection system also contains water thermo valve, delay valve and check valves to control and protect the air injection system.
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.