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: Description
Pulse air injection system is used to inject fresh air into exhaust system. When fresh air is injected into hot exhaust gases, combustion takes place. This reduces amount of unburned fuel that escapes into the atmosphere.
System consists of check valves, control valves, control valve solenoids, vacuum reservoir, vacuum lines and air lines. Pulse air system is capable of injecting air at both catalytic converter (downstream) or at front exhaust pipe.
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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.