Ford E8AZ-9H465-A Valve Assembly

You can Select Your Vehicle to check if E8AZ-9H465-A fits your vehicle.

The EGR system is used to reduce NOx emissions by recirculating a small amount of exhaust gases into the intake manifold. The flow rate of the EGR is determined by the Differential Pressure Feedback (DPFE) system, which monitors the pressure across a metering orifice. The DPFE system is more accurate than previous systems as it can account for changes in exhaust back pressure. The EGR system consists of components such as the EGR valve, EGR vacuum regulator, differential feedback pressure sensor, PCM, EGR pipe, and vacuum and pressure lines. Trouble codes can be used to diagnose EGR system problems. Too much EGR flow can cause rough running or engine stalling, while too little or no EGR flow can lead to high combustion temperatures and issues such as spark knock or emission test failure. Checks can be performed on the EGR valve and EGR control system to identify problems. The EGR valve is controlled by an EVR and the PCM, and its operation can be tested using a vacuum pump. The EGR control system relies on sensors such as the ECT, TPS, MAF, and TCC to determine the correct ON time for the EGR. The EVR can be tested for voltage and resistance, and the DPFE sensor can be checked for signal voltage. If component replacement is necessary, the EGR valve, EGR vacuum regulator, and DPFE sensor can be removed and replaced following the appropriate steps.