Genuine Ford Bronco EGR Valve

Ford Bronco EGR Valve Parts Questions & Answers

• Valve - Exhaust Gas
  F57Z-9D475-B
  Q: What is the function of EGR system,egr valve and other valve on Ford Bronco?

  A: For fuel economy purposes designers make adjustments to air/fuel ratios in cruise mode. When people mix lean, the combustion temperatures become high and generate pollutants like NOx. To control NOx during lean cruise modes, the EGR system reintroduces small quantities of exhaust gas into the intake manifold. It is the EGR valve that joins the exhaust system to the intake manifold, which is controlled by a vacuum-activated diaphragm. The F-series and Bronco vehicles have three different types of EGR systems, conventional ported vacuum, integral backpressure valve, and Electronic EGR (EEGR) system. The early non-U.S models used ported vacuum valves while early U.S carbureted models used integral backpressure valves.
• Valve Assembly
  E5PZ-9H473-B
  Q: How to remove and install Catalytic Converter, EGR Valve, EGR Valve Position Sensor and Vapor Canister on Ford Bronco?

  A: To begin with, disconnect the battery so as to perform maintenance on the EGR system components. To install a new O-ring during installation, unplug the electrical connector from the EVP sensor, remove the mounting bolts, and then detach the sensor. Disconnecting the battery is required for EGRC or EGRV Solenoid(s). They can be found on firewall, you will need to unplug the electrical connector, label and detach vacuum hoses, and remove the solenoid if it is held by bracket screws. EVR solenoid requires removing the solenoid, unplugging the sensor harness electrical connector and vacuum hose, and detaching the battery cable. Detach the vacuum line and mounting bolts after unplugging the electrical connector from EGR valve position sensor of the EGR valve. The valve should be removed after taking out the threaded fitting for the external exhaust supply tube (if present), unscrewing the mounting bolting, and removing a vacuum line. The gasket should also be replaced. When substituting an EGR valve without a position sensor; one can transfer the old one to fit with a new O-ring. Disconnect the battery before dealing with TAB/AIRB or TAD/AIRD solenoid(s) on the firewall then unplug the electrical connector from the solenoids located there then mark before removal of their vacuum hoses and solenoid/bracket screws. Labeling and disconnecting hoses are done when replacing faulty components in air pump and control valves on MTA systems before reattaching hoses.
• Valve Assy - EGR Vacuum Control
  D5FZ-9D473-B
  Q: What is the purpose of the emission control system and EGR Valve in Ford Bronco?

  A: The valves and components in the emission control system control exhaust gas recirculation (EGR) in vehicles. Its operation is based on a ported vacuum, which provides an ideal EGR signal during part-throttle and cruise conditions. BP valve modulates the flow of EGR using ported vacuum and exhaust back pressure. An electronic EGR valve controlled by a position sensor is used for EEGR. Troubleshooting entails dealing with issues affecting drivability, failed smog certifications or warning lights on the dashboard. The self-check function generates Diagnostic Trouble Codes (DTCs) to facilitate diagnosis. Vacuum testing, leakage tests, functional tests, and resistance measurements constitute some of the checks that need to be done on these systems.