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:

    Bezel
    Removal 1. Remove the shifter top control panel. 2. Disconnect the electrical connectors. 3. Remove the shifter bezel. 4. Remove the bulb from the bezel. 5. Disconnect the connector. 6. CAUTION: Extra force may be needed to lift up on the handle. Do not ...

    Installation
    1. Overlay the new rear window glass assembly over the old rear window glass assembly and transpose the markings with a grease pencil. 2. Center the V-notch on the new rear window glass assembly to the center mark on the top of the number four bow ...

    Pinpoint Test L: B1892 - Air Bag Tone Warning Indicator Circuit Shorted to Ground or Open
    Normal Operation The restraints control module (RCM) monitors its connection to the generic electronic module (GEM) at C201e pin 10. This connection is used to signal a chime if the air bag indicator is inoperative and another SRS fault exists. If the R ...