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Home >> Ford >> 1981 >> Courier 2.3L Eng VIN 2, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Vacuum Amplifier Reservoir
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Vacuum Amplifier Reservoir

  1. If reservoir does not have an external check valve, disconnect hose to amplifier and connect an external vacuum source to reservoir. Apply 14" Hg to reservoir. Charge reservoir with 14" vacuum. Vacuum should hold, with no more than 1" Hg drop, for at least one minute. If vacuum drops, replace reservoir.
  2. If reservoir does have an external check valve, apply an external vacuum source 15 in. Hg to "T" between check valve and reservoir at amplifier side of "T". Vacuum should not vary more than 1 in. Hg for one minute. If vacuum drops, replace reservoir.
  3. Remove hose to reservoir "T" and charge reservoir with an external vacuum source of 15 in. Hg. Vacuum should not vary more than 1 in. Hg for one minute. If vacuum varies, replace reservoir. To test check valve, disconnect hose to check valve at "T", and apply an external vacuum source of 15 in. Hg. Vacuum should not vary more than 1 in. Hg for one minute. If vacuum varies more, replace check valve.
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