Tailpipe Emissions Test

Tailpipe Emissions Inspection

NOTE: It is not possible to use a CO meter to adjust the idle mixture; the effect of the catalytic converter prevents accurate tracking of such small changes in air/fuel ratio.

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

1. Follow steps in the propane enrichment method for Idle Speed/Mixture Adjustment/Inspection.Adjustments
2. Warm up and calibrate the CO meter according to the meter manufacturer's instructions.
3. Check idle CO with the headlights, heater blower, rear window defroster, cooling fan, and air conditioner off.

CO meter should indicate 0.1% maximum.