EGR Valve: Testing and Inspection

1. Run engine at idle speed and disconnect vacuum hose from EGR valve.

2. Disconnect intake manifold vacuum line from vacuum amplifier and connect to EGR valve. The engine should then stall or idle roughly. If not, stop engine and remove the EGR valve.

3. Clean passages of EGR valve and pipe with a brush and a wire.

4. Install EGR valve and repeat test. If engine still does not stall or run roughly, replace the EGR valve and repeat test.

5. If test is satisfactory, reconnect vacuum lines to original positions.