Evaporative Emission System Uses 4 Basic Components Oldsmobile Aurora I

1. Activated carbon canister (may be sealed or open at top or bottom for fresh air intake).
2. Tank pressure control valve (mounted internally or externally to fuel tank).
3. PCM-controlled canister purge control solenoid (mounted in-line or on canister).
4. Canister purge control valve (mounted in-line or on canister).

See appropriate EMISSION APPLICATIONS article for specific component application. For vacuum hose routing, see VACUUM DIAGRAMS article.