Mercury F37Z-9D475-B Valve - Exhaust Gas

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The ported vacuum valve operates based on ported vacuum and provides an ideal signal for EGR during part-throttle and cruise conditions.

Replacements of other components related to the air inlet control, deceleration throttle control, intake manifold heating, PCV system, and catalytic converter typically involve disconnecting wires and hoses, removing faulty components, and installing new ones as needed.

The EGR system consists of components such as the EGR valve, EGR vacuum regulator, differential feedback pressure sensor, PCM (Powertrain Control Module), EGR pipe, and vacuum and pressure lines.

It was discontinued due to the introduction of Electronic Engine Control (EEC) systems and their associated EEGR system.

The EGR system reintroduces small metered amounts of exhaust gas back into the intake manifold during part throttle and cruise conditions, where it combines with the air/fuel mixture before combustion, lowering combustion temperatures and reducing NOx emissions.

Potential replacements include the EGR valve, EGR vacuum regulator, and DPFE sensor. Safety precautions and protective gear are emphasized during EGR valve and passage cleaning to prevent damage.

Checks for ported valves, integral back pressure transducer valve, and electronic EGR valves involve vacuum testing, leakage tests, functional tests, and resistance measurements.

To perform maintenance on the EGR system components, start by disconnecting the battery's negative terminal. For the EVP sensor, located on the EGR valve, unplug the electrical connector, remove the three mounting bolts, and detach the sensor, ensuring to use a new O-ring during installation. The EGR Control (EGRC) or EGR Vent (EGRV) Solenoid requires disconnecting the battery, locating the solenoid(s) on the firewall, unplugging the electrical connector, labeling and detaching vacuum hoses, and removing the solenoid(s) by unscrewing the bracket screws. The EGR Vacuum Regulator (EVR) solenoid, located on the engine-mounted solenoid bracket assembly, involves detaching the battery cable, unplugging the sensor harness electrical connector and vacuum hose, and removing the solenoid. The EGR valve, for vehicles with EEGR, necessitates unplugging the electrical connector from the EGR valve position sensor, unscrewing the threaded fitting for external exhaust supply tube (if present), removing the vacuum line and mounting bolts, detaching the valve, and replacing the gasket. If replacing the EGR valve without the position sensor, transfer the sensor to the new valve with a new O-ring. For Thermactor system components, such as the TAB/AIRB or TAD/AIRD solenoid, disconnect the battery, locate the solenoid(s) on the firewall, unplug the electrical connector, label and detach vacuum hoses, remove the solenoid/bracket screws, and detach the solenoid(s). Air pump and control valves on MTA systems involve labeling and disconnecting hoses, replacing the faulty component, and reattaching hoses. For the air supply pump on MTA systems, loosen drivebelts, remove the faulty pump, label hoses, install the new pump, and adjust drivebelts. Replacement of check valves requires using a back-up wrench if connected to a steel air tube. Charcoal canister replacement involves removing a single mounting bolt, lowering the canister, detaching the hose, and reinstalling in reverse. Other component replacements, such as those related to the air inlet control, deceleration throttle control, intake manifold heating, PCV system, and catalytic converter, follow straightforward procedures of disconnecting wires and hoses, removing faulty components, and installing new ones as needed.

The EGR system helps reduce oxides of nitrogen (NOx) by recirculating exhaust gases from exhaust ports through the EGR valve and back into the intake manifold, thereby lowering peak flame temperature during combustion. Models are equipped with the Electronic Exhaust Gas Recirculation (EEGR) system, which depends on the PCM for EGR control. The EGR flow rate is gauged by monitoring the pressure across a fixed orifice when exhaust gases pass through it, termed the Differential Pressure Feedback (DPFE) system. The system consists of the EGR valve, EGR vacuum regulator (EVR), Powertrain Control Module (PCM), differential feedback pressure sensor, EGR pipe, and various vacuum hoses. For EGR valve replacement, use the code stamped on its top when buying a new one. Turn the ignition OFF, remove the air filter housing, disconnect the EGR valve connector and vacuum hose, detach the EGR pipe, and remove the EGR valve retainer bolts. Clean the EGR valve gasket surface if reusing. For EGR pipe replacement, disconnect the vacuum lines from the DPFE sensor and the pipe at the manifold and valve. For the EVR, disconnect the electrical connector, label and detach vacuum hoses, and remove the regulator. For the DPFE sensor, disconnect the electrical connector, label and detach vacuum hoses, and remove the assembly. The 6.4L diesel engine uses two coolers for its EGR system, with the EGR valve located on top of the engine. It fits into a hole in the intake tract, sealed by an O-ring, and is attached with three bolts. Due to its tight fit, a special tool (Ford #303-1267) is required for removal, suggesting dealership involvement for replacements.

The EGR system accomplishes its purpose by recirculating a small portion of inert exhaust gases into the intake manifold. This lowers the combustion temperature and mitigates the formation of NOx compounds.

To replace the EGR valve, you need to follow these steps:1. Disconnect the negative battery cable.2. Remove the air cleaner outlet tube.3. Disconnect the EGR valve vacuum hose.4. Disconnect the EGR exhaust manifold tube.5. Remove the EGR valve from the intake manifold.6. Clean the gasket surfaces.7. Install the new valve.

The EGR system consists of components such as the EGR valve, EGR vacuum regulator, differential feedback pressure sensor, PCM (Powertrain Control Module), EGR pipe, and vacuum and pressure lines.