Evaporative Emissions System: Testing and Inspection

1. Start and warm up the engine to the normal operating temperature.
2. Let the engine idle.
3. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
4. Put a finger to the purge solenoid valve and verify there is no vacuum applied.
5. If there is vacuum:
- Check the purge solenoid valve.
- Check for loose or damaged vacuum hose.
- Check wiring between purge solenoid valve and PCM terminal 67 (short circuit).