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Home >> Mercury >> 1977 >> Capri II Base, 2.3L Eng, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION (EGR) System (CAPRI II) >> Testing >> Vacuum Reservoir

Vacuum Reservoir

  1. If vacuum reservoir does not use an external check valve, disconnect reservoir to amplifier hose. Evacuate reservoir to 14 in. Hg and trap vacuum. Vacuum should hold within 1 in. Hg for one minute. If not, replace vacuum reservoir.
  2. If reservoir utilizes an external check valve, apply 15 in. Hg at "T" between check valve and reservoir (amplifier side of "T"). Vacuum should remain trapped within 1 in. Hg for one minute. If not, remove hose to reservoir at "T" and apply 15 in. Hg of vacuum to reservoir.
  3. Vacuum should remain trapped within 1 in. Hg for one minute. If not, replace reservoir. If reservoir is okay, inspect check valve by removing hose to check valve at "T" and apply 15 in. Hg of vacuum. Vacuum should remain trapped within 1 in. Hg for one minute. If not, replace check valve.
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