Evaporative Emissions System: Testing and Inspection

GENERAL INSPECTION
The system should be inspected to ensure all canister, control solenoids and valves, liquid/vapor separator and all other components, are properly installed. Vacuum and vent lines should be inspected for proper connection and also for wear and damage. The fuel tank(s) should also be checked for proper filler cap installation.




CHECKING VAPOR LINES
1. Visually inspect vapor lines for improper attachment, cracks, damage, chafing, or deterioration.
2. Inspect vacuum relief valve of fuel tank filler cap for clogging, sticking, etc.