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.
- 5.3 kPa (1.6 in.Hg) or less -- Air blows out of opposite passage.
- 29 kPa (8.7 in.Hg) or more -- Air does not blow out of opposite passage.