What does the EGR system do? The function of the EGR system is to reduce oxides of nitrogen (NOX) in exhaust emissions, reduces cylinder combustion temperatures, and helps prevent spark knock. The EGR system allows a predetermined amount of exhaust gas to recirculate and dilute the incoming air/fuel mixture to reduce peak temperatures during combustion.
When is the EGR system needed? The amount of emissions NOX produced at low engine speeds is very small and is not needed at idle. It is also not needed during wide-open throttle driving, to achieve efficient acceleration. Recirculation is required during cruising and non-wide-open acceleration at speeds between 30 to 70 mph when NOX formation is highest.
The EGR system consists of an EGR Valve, EGR solenoid, EGR backpressure transducer, signal tube and hoses. The solenoid operation is controlled by the powertrain control module (PCM) and the EGR backpressure transducer operation is controlled by the exhaust system backpressure.
Most failures of the EGR systems are due to the transducer and solenoid. We can now offer a quicker and more cost-effective solution for replacing just the faulty transducer and solenoid, perfectly matching the OEM EGR valve specifications.
