Ford Mustang (1999-2004) Service Manual: EGR System Components

EGR System Components

 

EGR System Components

The EGR system returns a portion of the exhaust gas to the intake manifold to reduce the combustion temperature. This results in lower nitrous oxide formation.

The powertrain control module (PCM) controls the EGR vacuum regulator solenoid . The EGR vacuum regulator solenoid controls the vacuum to the EGR valve. When the EGR valve opens, exhaust gas flows to the intake manifold. The EGR transducer measures the flow through the EGR valve to exhaust manifold tube and sends a signal to the powertrain control module. A metering orifice in the EGR valve to exhaust manifold tube restricts the flow rate when the EGR valve is open.

The PCV valve:

  • controls the amount of ventilating air and blow-by gases going to the intake manifold.
  • prevents a backfire from reaching the crankcase.

The EGR valve to exhaust manifold tube:

  • connects the exhaust manifold to the EGR valve.
  • has two tubes connecting to the EGR transducer for EGR flow monitoring.

The EGR transducer:

  • monitors the EGR flow rate through the EGR valve to exhaust manifold tube.
  • sends an EGR flow rate signal to the powertrain control module.

The EGR vacuum regulator solenoid uses input from the powertrain control module to change the EGR valve operation.

Engine Emission Control (DIAGNOSIS AND TESTING)

Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.

    Typical Vehicle Emission Control Information (VECI) Decal
      The Vehicle Emission Control Information (VECI) decal shows: the components of the emission control system. the correct vacuum hose routing. the color stripe of the vacuum hoses. ...

    Exhaust Gas Recirculation (EGR) Valve
    Removal and Installation NOTE: The 4.6L, 2V is shown. The 3.8L is similar. 1. Disconnect the vacuum hose. 2. Disconnect the EGR tube from the EGR valve. 3. Remove the two bolts, the EGR valve an ...

    Other materials:

    Front Seat Backrest
    Disassembly and Assembly All vehicles 1. Remove the front seat backrest. For additional information, refer to Front Seat Backrest in this section. 2. Remove the front seat backrest head restraint (611A08). 3. Remove the screws and the safety belt guid ...

    Key Programming - Erase All Key Codes and Program Two Keys
    Special Tool(s) Worldwide Diagnostic System (WDS) 418-F224, New Generation STAR (NGS) Tester 418-F052 or equivalent diagnostic tool NOTE: This procedure is used when a customer needs keys programmed into the system and does not have ...

    Warning lamps and indicators
    These indicators can alert you to a vehicle condition that may become serious enough to cause expensive repairs. Many lights will illuminate when you start your vehicle to make sure they work. If any light remains on after starting the vehicle, refer to the re ...