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Home >> Chevrolet >> 1981 >> Corvette Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Computer Command Control >> Operation >> Emission Control >> Exhaust Gas Recirculation (EGR)
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Exhaust Gas Recirculation (EGR)

The ECM controls ported vacuum to EGR valve with an electrically operated solenoid valve. When engine is cold, solenoid is energized, blocking vacuum to EGR valve. When engine is warm, solenoid is de-energized and EGR operation is allowed.

NOTE: Vehicles may use an integral EFE/EGR valve, TCC/EGR valve or an EFE/EGR/Canister Purge Valve.
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