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EGR Electronic Vacuum Regulator Solenoid: Testing and Inspection

1. Connect a suitable vacuum pump to the "Vacuum Regulator Valve" (VRV) port, and a vacuum gauge to the "EGR" or "TCC" solenoid port.
2. Apply 15 inches Hg vacuum draw to "VRV" port, while noting reading of vacuum gauge.
3. Vacuum gauge should read 2.5 inches lower than vacuum pump on all 1981 and 1982 High Altitude V8 engines; and 0.75 inches lower on 1982 V6 and V8 (Exc. High Alt.) engines.