Emission Control Systems: Testing and Inspection

WARNING: Do not smoke during this procedure. Keep any open flame away from your work area.

- Start the engine. Hold the engine at 3,000 rpm with no load (A/T in "N" or "P" position, M/T in neutral) until the radiator fan comes on, then let it idle.
- Connect a tachometer.
- Check and adjust the idle speed.
- Warm up and calibrate the CO meter according to the meter manufacture's instructions.
- Check idle CO with the headlights, heater blower, rear window defogger, cooling fan, and air conditioner off.
NOTE: (Canada) Pull the parking brake lever up. Start the engine, then check that the headlights are off.

CO meter should indicate 0.1% maximum.