Check Vacuum Source To EGR Valve

Start engine and warm to operating temperature. Disconnect hose from EGR valve and check vacuum. Vacuum should not be present. Raise engine speed to about 2000 RPM and check vacuum. Vacuum should be present. If vacuum is not as specified, go to next step. If vacuum is as specified, inspect EGR valve and EGRC-BPT valve. See SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section. Repair or replace as necessary and perform FINAL CHECK  .