EGR Valve: Testing and Inspection

EGR VALVE INSPECTION
1. Remove the EGR valve and inspect for sticking, carbon deposits, etc. If contaminants are found, clean the valve with a suitable solvent so it will seat correctly.
2. Connect a hand vacuum pump to the EGR valve.
3. Apply 67 kPa (20 in.Hg) of vacuum, and check that the vacuum is maintained.
4 Apply vacuum according to the chart below, and check the passage of air by blowing through either side of the EGR passages.

Vacuum / Passage of Air
- 6.5 kPa (2.5 in.Hg) or less = Air blows cut of opposite passage.
- 20 kPa (6 in.Hg) or more = Air does not blow out of opposite passage.