EGR Valve

EGR VALVE TESTING

EGR Valve Test:

1. Remove the EGR valve and check it for sticking or carbon deposits.
If such condition exists, refer to MAINTENANCE PROCEDURES for EGR Control Valve and Passages cleaning.
2. Connect a hand vacuum pump to the EGR vacuum nipple.
If there is more than one nipple, the second nipple will need to be plugged for this test.
3. Apply 19.8" vacuum to the vacuum chamber of the EGR valve.
Vacuum should NOT leak. Release vacuum.
4. Apply 2.1" of vacuum. Blow air in from one side of the valve.
Air should NOT pass through
5. Increase vacuum to 6.8" while blowing air through EGR passage.
Air should pass through.