EGR Valve Inspection

1. Remove the Exhaust Gas Recirculation (EGR) valve and inspect for sticking, carbon deposits, etc. If found, clean with a suitable solvent so that the valve seats correctly.
2. Connect a hand vacuum pump to the EGR valve.
3. Apply 67 kPa (20 in. Hg) of vacuum, and check to be sure that the vacuum is maintained.
4. Apply a vacuum and check the passage of air by blowing through one side of the EGR passage.

Vacuum Passage of air

5.3 kPa (1.6 in. Hg) or less Air is not blown out
27 kPa (7.9 in. Hg) or more Air is blown out