Vacuum Amplifier (Pickups)
- Disconnect lead hose that connects vacuum amplifier to EGR valve and set T-connector and vacuum gauge. When idling, make sure that vacuum gauge reading is within 5.3-6.5 in. Hg. If EGR vacuum is excessively outside specified range, replace vacuum amplifier.
- When engine speed is at about 2000 RPM, make sure that vacuum gauge reading is within 11.2-12.8 in. Hg. If EGR vacuum is excessively outside specified range, replace vacuum amplifier.