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What is a egr valve for cars?

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Anonymous

16y ago
Updated: 8/17/2019

Exhaust Gas Recirculation: in simple terms the valve helps by recirculating some exhaust back into the cylinder (when the engine needs it) to reduce the combustion temperature. Combustion at too high of a temp can make the gas in the cylinder burn to early; this reduces the power, creates a knocking noise in the engine, and worsens the emissions.

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Wiki User

16y ago

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