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This is quite easy to do. You will have to replace it.
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Egr valve testing procedure. 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. The procedure to test an electronic EGR is a bit different and requires a multimeter.
If you notice your vehicle running poorly stalling or having poor gas mileage you should test the EGR. High volts could mean there is a blockage somewhere within the EGR valve and no voltage could signal a problem with the valve and computer communication. 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. The testing procedures shown in this video apply to all electronic style EGR systems.
In particular the 5-wire Linear EGR valve used on many different GM veh. Connect the valve 2. Attach the tester crocodile clips to a 12V source 3.
The valve can now be tested 4. The technician can now determine whether the valve needs replacing or can simply be cleaned. The EGR valve thats covered by this article are for 31L 34L and 35L GM vehicles from 2000 to 2009 models years although some late 1999 models use this type of EGR valve too.
To make sure this tutorial applies to your specific vehicle check this section out first. Identifying The EGR Valve. Here is a detailed video on how different EGR Systems work and how you can test diagnose and fix different issues within these systemsIf you liked this vid.
These steps will show you how to test the old vacuum type EGR valve and the new computer-operated EGR valve. This is quite easy to do. There are two techniques you can use to test the EGR valve.
Starting with the vacuum type EGR valve. Note if the diaphragm starts to leak then obviously the valve is bad. You will have to replace it.
Page 1 of 6. How to Test the Ford EGR Valve EGR Vacuum Solenoid DPFE Sensor. Common Symptoms of a BAD EGR Valve.
Testing the Ford EGR Valve EGR Valve Vacuum Solenoid and DPFE Sensor on Ford Lincoln Mercury and Mazda. How to test a 5-wire electronic EGR valve how to manually energize the EGR valve how to energize the EGR valve with a scan tool how to test EGR valve position sensor signal with a voltmeter how to determine EGR solenoid polarity with a wiring diagram how to determine EGR solenoid polarity with a. An EGR valve works by recirculating a bit of the engines exhaust gas back to the engine cylinders.
This dilutes the atmospheric air in the incoming air stre. Attach the loose jumper wire back on the battery. The solenoid should click again.
Blow through the vacuum hose. Air should pass through when it is energized. This test determines whether the valve is opening when it is energized allowing unrestricted flow of vacuum.
If the solenoid fails any of these tests replace it. The EGR valve has a solenoid that when commanded On by the PCM it opens the EGRs pintle to let exhaust gas circulate back into the engine. If the EGR solenoid does not get power 10 to 12 Volts or the solenoid is bad the PCM will set a P0403 DTC.
So this test will check to see if this part of the EGR valve is getting power. Replacing an EGR Valve. If youre considering the choice of whether to clean your EGR valve or simply replace it to get your emissions control system back up and running and pass your states vehicle inspection or emissions testing you need to do a little cost analysis.
Types 1098-EGR and 1098H-EGR Pressure Reducing Regulators. Laboratory testing for lockup and external leakage down to -76F -60C. On nameplates located on both the actuator and main valve body while the pilot control spring range is displayed.
Single diaphragm type EGR valve Using a manual vacuum hand pump can verify movement of the valve and the condition of the diaphragm. This can be performed on or off the vehicle. Dual diaphragm types will vary in test procedure.