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EGR & Related Components

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Anatomy of an ERG Valve

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Exploded image showing details of ERG Valve


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

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