EGR System Module Tube (5.4L 4V)

The EGR system module tube:

• connects the exhaust manifold to the EGR system module and provides a path to deliver exhaust vapors to the EGR system module.

The EGR vacuum regulator solenoid uses input from the PCM to achieve the calibrated level of EGR flow for various engine operating conditions.

The PCM controls the EGR system module opening via the vacuum regulator solenoid. When the EGR system module opens, exhaust gas flows to the intake manifold. The EGR system module transducer measures the delta pressure across the orifice located in the EGR system module gasket. This delta pressure signal is sent to the PCM providing an indication of the EGR mass flow that was delivered.

The amount of recirculated exhaust gas depends on:

• engine rpm.
• intake manifold vacuum.
• exhaust backpressure.
• engine coolant temperature.
• throttle position.