Exhaust Gas Recirculation (EGR) System

Exhaust Gas Recirculation (EGR) System - 3.0L (4V)

The EGR system:
- is electronically controlled by the PCM.
- 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 valve:
- is connected to the exhaust manifold by the EGR valve to the exhaust manifold tube.
- controls recirculated exhaust gas flow to the intake manifold.
- monitors the flow of recirculated exhaust gases through the EGR valve to the exhaust manifold tube.
- returns a signal to the powertrain control module.

The amount of recirculated exhaust gas depends upon:
- Engine rpm
- Intake manifold vacuum
- Exhaust back pressure
- Engine coolant temperature
- Throttle position