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System Inspection: Non-Turbo

  1. Warm engine to normal operating temperature and turn off. Disconnect intake air temperature sensor connector. Connect a 2000-3000 ohm resister to terminals of sensor connector. See Fig 1 .
    Fig 1: Connecting Resister to Intake Air Temperature Sensor Connector
    G65822Courtesy of MAZDA MOTORS CORP.
  2. Connect tachometer and start engine. Check that engine speed is about 800 RPM for 90 seconds and about 750 RPM after 90 seconds.
  3. Turn engine off and disconnect vacuum hose from pressure regulator. See Fig 2 .
    Fig 2: Testing Vacuum at Pressure Regulator
    G65823Courtesy of MAZDA MOTORS CORP.
  4. Place finger on vacuum hose port and start engine. Check that for 90 seconds air is not pulled into port. After 90 seconds, air should be pulled into port.
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