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:

    Entertainment
    Your system offers many media options. You can access these options using the touchscreen or voice commands. AM/FM Radio Press the RADIO hard button. To change between AM, FM1 and FM2, touch the AM or FM tab. You can also access satellite radio by pressing t ...

    Transmission Cooling
    Inspection and Verification WARNING: Never remove the radiator cap under any conditions while the engine is operating. Failure to follow these instructions could result in personal injury and/or damage to the cooling system or engine. To avoid having scaldin ...

    Gearshift Rail and Fork
    Disassembly and Assembly   1. Disassemble the first/second and third/fourth shift rail as follows: Rotate the interlock plate until it is opposite of the shift links. Slide off the third/fourth shift fork and shift link. Separate the link from the ...