How does the EGR pressure feedback sensor work?
When the EGR pressure feedback sensor detects that the pressure is low, it will open up the EGR valve to increase flow, and just the opposite will close the valve if it detects that pressure is too high.
How is the dpfe sensor connected to the EGR valve?
Basically, follow the EGR pipe until you see 2 metal tubes next to each other split off from it, then follow those to the rubber hoses and those hoses to the DPFE sensor. The EGR Actuator is an electric device that allows small amounts of vacuum pressure to pass on to the EGR Valve.
What happens when an EGR valve is not working?
When your EGR valve isn’t working correctly more emissions will be emitted. As aforementioned if the valve is stuck open the temperature is lowered which prevents all the fuel from burning. This means an increased flow of unburned hydrocarbon gases coming out of the tailpipe.
How does the EGR actuator work in a car?
Photo of EGR Actuator (DPFE Sensor wiring and a hose removed for clarity): The EGR Valve is a vacuum-operated gate that opens up to allow exhaust gases to travel from the exhaust manifold to the intake manifold for recycling. Photo of EGR Valve with vacuum hose attached to the top: Replacement of DPFE Sensor
When the EGR pressure feedback sensor detects that the pressure is low, it will open up the EGR valve to increase flow, and just the opposite will close the valve if it detects that pressure is too high.
On the way up to the EGR valve, the exhaust gas passes through a restriction. The DPFE sensor hoses are connected to ports 1 and 2—before and after the restriction. By comparing and reporting the differences in pressure, the computer can determine exactly how much exhaust gas is flowing through the EGR valve.
What happens if you don’t plug the EGR pipe?
Remember to plug the 2 metal tubes that come off the larger metal EGR pipe. Failure to do so will result in hot exhaust fumes being released under the hood. This is not only noisy, but could possibly result in carbon monoxide getting inside your car while driving. Photo of DPFE workaround, using the older style DPFE sensor.
What to do if your EGR sensor is bad?
For this reason, if you suspect that your EGR pressure sensor may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the sensor should be replaced. The most popular service booked by readers of this article is Exhaust and Emission System Inspection.
What happens if your EGR sensor is bad?
If the EGR pressure sensor sends any false reading to the computer it can cause the EGR system to malfunction. A malfunctioning EGR system can lead to engine performance issues such as rough idle, engine hesitation, and a decrease in overall power and fuel efficiency. 2. Failed emissions test
Do you need to test the Ford EGR valve?
Testing the EGR system on your Ford, Mercury, or Lincoln car or truck is a pretty easy affair. You don’t need expensive testing equipment to do it and more importantly, with this article you’ll be able to find out exactly what part (of the entire system) is bad and needs to be replaced and in the process saving time and money.