Evaporative Emission Control: Notes
WARNING: This page is about a different car, the 1995 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Not all listed components are used on every vehicle system. Component usage depends on calibration of vehicle.
The function of evaporative emission control system is to store gasoline fumes from fuel system in a carbon canister when engine is not running. During engine operation, fumes are drawn into engine for burning during combustion process, purging canister.
Three basic components are used in evaporative emission system:
- Activated carbon canister.
- Computer-controlled solenoid.
- Tank pressure control cap.
For specific component application and vacuum hose routing, see VACUUM DIAGRAMS article in the ENGINE PERFORMANCE section.