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Home >> Mazda >> 1995 >> MX-3 L4-1598cc 1.6L DOHC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Exhaust Gas Recirculation >> Description and Operation
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Exhaust Gas Recirculation: Description and Operation

View: EGR System Overview:





PURPOSE
The EGR System lowers combustion chamber temperatures to reduce NOx emissions.

OPERATION
The EGR system recirculates a portion of exhaust gas through the EGR valve and intake manifold into the combustion chambers. EGR valve operation is engine control module (ECM) controlled via vacuum and vent solenoid valves. The EGR system does not operate when coolant temperature is below 55°C (131°F), to improve driveability when engine is cold.

View: System Operation Chart:





At operating temperature, the system functions as described on image chart.
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