System Operation

EGR Mounting:

Electric EGR Transducer (EET):

Note: The EET assembly is a vacuum control solenoid and a backpressure transducer, in one package.

Purpose

The EGR system reduces oxides of nitrogen (NOx) in engine exhaust and helps prevent spark knock.

OPERATION

A metered amount of hot exhaust gas is introduced into the incoming air/fuel mixture. This dilution of the air/fuel mixture reduces peak combustion temperatures, inhibiting the formation of oxides of nitrogen.

The timing and amount of exhaust gas introduced is dependent on operating conditions, and is controlled by the PCM (through the EET solenoid) and engine load (through the EET Backpressure Transducer).