T100 Pickup 4WD V6-3.4L (5VZ-FE) (1995)
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Air/Fuel Mixture: Testing and Inspection
IDLE AND/OR 2,500 RPM CO/HC CHECK
HINT: This check is used only to determine whether or not the idle CO/HC complies with regulations.
1. INITIAL CONDITIONS.
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Engine at normal operating temperature.
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Air cleaner installed.
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All pipes and hoses of air induction system connected.
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All accessories switched OFF.
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All vacuum lines properly connected.
HINT: All vacuum hoses for EGR systems, etc. should be properly connected.
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MFI system wiring connectors fully plugged in.
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Ignition timing set correctly.
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Transmission in neutral position.
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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.
5. IMMEDIATELY CHECK CO/HC CONCENTRATION AT IDLE AND/OR 2,500 RPM.
HINT: When doing the 2 mode (2,500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.
Troubleshooting
Troubleshooting Emission Failures
