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EGR & Related Components
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Anatomy of an ERG Valve
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Summary
EGR & Related Components
The exhaust gas recirculation (EGR) system’s function is to help reduce vehicle emissions and pollutants that can damage the earth’s atmosphere. The system is designed to recirculate a portion of the engine’s inert exhaust gas back into the engine where it can mix with the incoming air/fuel. The inert exhaust gas, free of oxygen molecules, reduces the temperature within the combustion chamber resulting in a deficiency of harmful gas emissions.
The EGR system is found near or on the intake manifold.
If a component of the EGR system is failing, the vehicle may experience one or more of the following:
- Rough idle
- Stalling
- Hard start
- Decreased power
- Decreased fuel economy
- Pinging or knocking
- Increased emissions or failed emissions test
- Check engine light is illuminated