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Vacuum Amplifier

  1. Start engine and warm to normal operating temperature. On California models, remove connectors from EGR solenoid valve and apply battery power to terminal on valve. Remove vacuum amplifier vacuum hose from EGR control valve. Connect vacuum gauge to this hose.
  2. On Federal models, remove vacuum amplifier vacuum hose from thermo valve. Connect vacuum gauge to this hose. On all models, remove vacuum amplifier hose from carburetor
  3. Depress accelerator pedal several times, then allow engine to return to idle. Vacuum gauge should read 2 in. Hg. Connect amplifier hose back to carburetor. Increase engine speed to 3500 RPM. Gauge should now read 3.54 in. Hg. If amplifier does not give readings indicated, it should be replaced.
Fig 1: EGR System for 2.3L Engines (Federal)
G09313835Courtesy of FORD MOTOR CO.
Fig 2: EGR System for 2.3L Engines (Calif.)
G09313836Courtesy of FORD MOTOR CO.
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