EGR Valve

1. Remove the EGR valve and check it for sticking or carbon deposits.
2. Connect a hand vacuum pump to the EGR vacuum nipple.
3. Apply 500mm Hg (19.8 in. Hg) vacuum to the vacuum chamber of the EGR valve. Vacuum should NOT leak. Release vacuum.
4. Apply 40 mm Hg (1.6 in. Hg) of vacuum. Blow air in from one side of the valve. Air should NOT pass through.
5. Increase vacuum to 200 mm Hg (7.9 in. Hg) while blowing air through EGR passage. Air should pass through.
6. Re-install the EGR valve when testing is complete and tighten the mounting bolts to 13 Nm (9.4 ft. lbs).