How To Test Egr Valve

You can check the repair manual of your vehicle for this. A vacuum-controlled EGR valve is easy to test with a hand-held vacuum pump see the image.

P0401 Electronic Egr Valve Test Replace Tips Tricks How To Hd Youtube

If the EGR valve opens and the vacuum holds for more than a minute the EGR valve works.

How to test egr valve. After reading the diagnostic fault codes I used an actuator test on the EGR valve. You can now carefully push back the harness connector. Test it and or replace it with this easy to follow video and some simple tools listed in the SHOW.

Remove the plug and clean it using the valve cleaning kit to remove blockages. You can smell fuel You can usually smell fuel if there is a continuous flow of exhaust gases into the intake manifold because at low revs not all the fuel burns. P0401 Codes can be a blocked EGR passage or an EGR valve.

How to Test The EGR Valve. The procedure to test an electronic EGR is a bit different and requires a multimeter. 31L This engine is notorious for have problems with plugged EGR passages in the intake manifold.

Once the vacuum is released the valve should close fully. A vacuum-controlled EGR valve is easy to test with a hand-held vacuum pump see the image. Check for Diagnostic Trouble Codes DTCs The first thing youll want to do is check for DTCs that could narrow down the troubleshooting process.

The vehicle computer operates the valve instead of previous years EGR valves which are operated by the engine vacuum. In most cases youll find it around the top area and to one side of the engine. If you cannot check on your own ask for a mechanics assistance.

This is the easiest and the most effective way of getting at the signals. Open 5v reference circuit from a bad engine computer Ill also show. If you notice your vehicle running poorly stalling or having poor gas mileage you should test the EGR.

What I recommend you do is to test for each signal with the connector connected using a wire-piercing probe. The car being tested has a 3100 engine in it. How to Test an EGR Valve Locate the EGR valve.

To ensure the valve is to blame youll want to perform a thorough diagnosis of the vehicle by doing the following. 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. To test these circuits its not necessary to unplug the EGR valves connector.

Once the vacuum is released the valve should close fully. Spray the EGR retaining bolts with rust penetrant and let them sit while you disconnect the electrical and vacuum lines from the valve label the vacuum lines so you know which ports they came from. Open the bonnet and locate the EGR valve.

Stalling when the engine idles like a rough idle is usually caused when the EGR valve is permanently open and is constantly letting exhaust gases into the EGR system. When the EGR valve is blocked error codes of P1404 and P1406 may display on the engine light area. The EGR valve and MAP sensor are quite accessible on this particular engine so testing the system was straightforward.

The valve could be heard moving inside the housing. If a vacuum diaphragm inside the EGR valve is leaking the vacuum will drop. For an electric EGR valve you need to have a multimeter.

If the EGR valve opens and the vacuum holds for more than a minute the EGR valve works. Connect the black multimeter lead to a ground point such as the battery negative cable. How to Test an EGR Valve Locate the EGR valve Look for a round thick metal disc about three inches in diameter.

In particular the 5-wire Linear EGR valve used on many different GM vehicles. How to diagnose a clogged EGR. You may need to look between and under some components on your vehicle.

In this video I show another variable when it comes to testing this type of EGR valve. If a vacuum diaphragm inside the EGR valve is leaking the vacuum will drop. Then remove the retaining bolts and lift the EGR valve out of the engine compartment.

Turn the ignition key to the On position. Remove one of the jumper wires from the battery and install vacuum hoses on the two vacuum ports located on the EGR solenoid. A manifold absolute pressure MAP sensor is fitted to the intake manifold.

Attach the red lead wire to the EGR circuit labelled C There are five circuits on the EGR and each is labelled A-E. The solenoid controls a rapid-deployment valve to regulate the flow of vacuum through the ports to the EGR valve. In most cases youll find it around the top area and to one side of the engine.

Blow forcefully through one of. Look for a round thick metal disc about three inches in diameter. The testing procedures shown in this video apply to all electronic style EGR systems.

Also you should see a thin vacuum line connected to the top of the valve. Several different problems can mimic a bad EGR valve.

Egr Valve Problems Symptoms Testing Replacement