EGR Valve: Testing and Inspection

1. Start the engine and let it idle.




2. Connect a vacuum pump as shown in the figure and apply vacuum.
3. Verify that the engine runs roughly or stalls at more than the specified vacuum.

Specification
-3.4 To -9.9 kPa {-25 To -75 mmHg, - 1.0 To -2.9 in.Hg}

4. If not as specified, replace the EGR valve.