How to test an egr valve

You can now carefully push back the harness connector. Turn the ignition key to the On position.

EGR valve symptoms can vary however the most common symptoms of a faulty EGR valve are explored below.

How to test an egr valve. How to Test an EGR Valve Locate the EGR valve. Look for a round thick metal disc about three inches in diameter. In most cases youll find it around the top area and to one side of the engine.

You may need to look between and under some components on your vehicle. Also you should see a thin vacuum line connected to the top of the valve. Turn the multimeter on and set the dial to Volts DC Attach the red lead wire to the EGR circuit labeled C There are five circuits on the EGR and each is labeled A-E.

Connect the black multimeter lead to a ground point such as the battery negative cable. Turn the ignition key to the On position. To test these circuits its not necessary to unplug the EGR valves connector.

What I recommend you do is to test for each signal with the connector connected using a wire-piercing probe. This is the easiest and the most effective way of getting at the signals. Test EGR valve in 2003 Ford Expedition with engine code P0401.

Andy Phillips shows how to test an EGR Solenoid using various methods. For an electric EGR valve you need to have a multimeter. This device will be used to do a resistance reading referred to as an ohms test Once connected you should see a reading of about 20 to 24 ohms.

You can check the repair manual of your vehicle for this. You can now carefully push back the harness connector. Car or truck runs fine but the check engine light CEL is on with an EGR Valve Fault Code.

P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position. Really bad gas mileage.

Lack of power as you accelerate the vehicle down the road. Check the passage under the EGR valve to see if its clogged with carbon. If it is gently chip out the carbon with a small screwdriver and vacuum it out with a shop vacuum.

Then reinstall the EGR valve using the new gasket. Required Tools for this EGR Valve Cleaning Project. A clogged or defective EGR valve will trip a Check Engine or Emission Control light on the dashboard.

The owner will have to take his vehicle to a certified test and repair station that has a code scanner OBD. The scanner will then be plugged into the vehicles computer system and a trouble code will be identified. EGR valve symptoms can vary however the most common symptoms of a faulty EGR valve are explored below.

Your engine has a rough idle A rough idle when starting your vehicle or during brief stops ie. Low engine speeds with a warmed-up engine can be caused when the EGR is constantly open and a continuous flow of exhaust gases goes into the. A manifold absolute pressure MAP sensor is fitted to the intake manifold.

The EGR valve and MAP sensor are quite accessible on this particular engine so testing the system was straightforward. After reading the diagnostic fault codes I used an actuator test on the EGR valve. The valve could be heard moving inside the housing.

Attach the tester crocodile clips to a 12V source. The valve can now be tested. The technician can now determine whether the valve needs replacing or can simply be cleaned.

Even if your car showing symptoms of a bad EGR valve it does not mean that you have to replace it. You should test it before throwing into the junkyard. You can examine a vacuum-operated EGR valve with a handheld vacuum pump while a diagnostic scan tool is required for testing an electronic EGR valve.

Step 1 Use a car scan to test the EGR valve. A scan tool reads information from your On-board Diagnostics version II OBD-II system. This system collects information from the sensors in your engine.

If the sensor detects something wrong it reports it as an error code to the OBD-II. A scan tool allows you to read this code. The scan tool plugs into OBD-II data link connector which is usually Step 2 Locate the OBD-II data connector.

The most common location for the OBD-II connector is.