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
All models (except 1979 Supra) use an air injection or air suction system to supply fresh air at the exhaust ports to burn HC and CO remaining in the exhaust gases. The following table shows model application of these systems:
| Application | System | |
|---|---|---|
| Celica, Corona, Pickup | Air Injection | |
| Corolla | 1600 | |
| Federal | Air Suction | |
| California | Air Injection | |
| High Altitude | Air Injection | |
| Corolla 1200 | Air Suction | |
| Cressida | Air Injection | |
| Land Cruiser | Air Injection | |
Use the Manual With the Right Hardware
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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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