Carbon canister storage is used for evaporative fuel control on all vehicles. The function of evaporative emission control system is to store gasoline fumes from fuel tank in a carbon canister until fumes can be drawn into engine for burning during combustion process.
Evaporative emission system uses 4 basic components
- Activated carbon canister (may be sealed or open at top or bottom for fresh air intake).
- Tank pressure control valve (mounted internally or externally to fuel tank).
- PCM-controlled canister purge control solenoid (mounted in-line or on canister).
- Canister purge control valve (mounted in-line or on canister).
See approrpiate EMISSION APPLICATIONS article for specific component application. For vacuum hose routing, see VACUUM DIAGRAMS article.