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 Reactor: Description
The Pulse Air (PAIR) Injection system is a non-pump type air injection system which uses engine exhaust pulses to draw fresh air into the exhaust system. This helps to further oxidize HC and CO emissions. System consists of a grouping of check valves in a Pulse Air valve assembly (2 used on V6 and V8 applications) and related tubing.
The Pulse Air system is used on Chevrolet Chevette, 151" 4 cylinder engines (except Calif.), and on some V6 and V8 engines.
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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.