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Engine Co/HC Emission Testing: Inspection

NOTE: This check is used only to determine whether or not the idle CO/HC complies with regulations.
  1. INITIAL CONDITIONS 
    1. Engine at normal operating temperature
    2. Air cleaner installed
    3. All pipes and hoses of air induction system connected
    4. All accessories switched OFF
    5. All vacuum lines properly connected
    6. SFI system wiring connectors fully plugged
    7. Ignition timing checked correctly
    8. Transmission in neutral position
    9. Tachometer and CO/HC meter calibrated by hand
  2. START ENGINE 
  3. RACE ENGINE AT 2,500 RPM FOR APPROX. 180 SECONDS 
  4. INSERT CO/HC METER TESTING PROBE AT LEAST 40 cm (1.3 ft) INTO TAILPIPE DURING IDLING 
    Fig 1: Inserting CO/HC Meter Testing Probe
    G02851568Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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