EGR System
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The EGR system:
- returns a small amount of exhaust gas into the engine for recombustion.
- reduces the overall combustion temperature and provides a significant reduction of oxides of nitrogen (NOx).
The EGR system module:
- is electronically controlled by the PCM.
- is connected to the exhaust manifold by the EGR system module-to-exhaust manifold tube.
- controls recirculated exhaust gas flow to the intake manifold.
- monitors the flow of recirculated exhaust gases through the EGR valve-to-exhaust manifold tube.
- returns a signal to the PCM.
The amount of recirculated exhaust gas depends upon:
- engine RPM.
- intake manifold vacuum.
- exhaust back pressure.
- engine coolant temperature.
- throttle position.