EGR Component Test

EGR Valve Test
1. Start engine and allow to idle.
2. Disconnect vacuum hose from EGR Valve and connect a vacuum pump to EGR Valve.
3. Apply 150 mm Hg (6 in. Hg) vacuum to EGR Valve.

Vacuum should remain steady and engine should die.

- If vacuum remains steady and engine dies, EGR valve is working properly. Remove the vacuum pump and reconnect EGR vacuum hose; test is complete.
- If vacuum does not remain steady and engine does not die, replace EGR valve and retest.
- If vacuum remains steady but engine does not die: Remove EGR valve; check EGR valve and manifold for blockage, clean or replace as necessary and retest.