Ford Mustang (1999-2004) Service Manual: 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 ...