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Test Sequence III

  1. Set engine to 2200-2800 RPM. Reconnect control vacuum hose to vacuum gauge "T" fitting. Disconnect vacuum hose from cold temperature vacuum switch (Pink hose). Apply 4.5-5.5 in. Hg vacuum to the switch and record data.
  2. While covering carburetor idle air bleed hole, reduce vacuum to zero and record data as directed on test chart. See Figure. Uncover idle air bleed hole and record data.
  3. Return engine to idle and verify that reading is less than 0.3 volt. Turn engine off, connect vacuum hose to fittings, and reconnect all electrical leads.
    NOTE: Complete all data gathering procedures for TEST SEQUENCE I, II and III before performing any diagnostic/repair procedures as listed under COMPONENT DIAGNOSIS, except as noted on data chart.
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