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: Description
The air injection system is used during warm-up to reduce emissions. The engines are equipped with oxygen sensor equipped feedback system, so air injection cannot be used while oxygen sensor is operating. The XJS system includes a thermal switch, check valve, air injection switching module, air switching valve, check valve, diverter valve, air rails and air pump. The XJ6 system includes air pump, air pump magnetic clutch, air pump clutch relay, air injection check valve, vacuum control solenoid, vacuum delay valve and diverter valve.
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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