Repair Info - Emissions Repair Explained
Overview | Component Testing - Doing It Right | Evaporative Control System TestingEvaporative Control System Testing
Vacuum hoses, valves, and the charcoal canister should first be visually inspected for any signs of damage or leakage. Next, the technician should check for a saturated charcoal canister by monitoring CO emissions ahead of the catalyst while blocking the purge hose from the charcoal canister. If measured CO drops by more than 1%, the canister is saturated and will need to be replaced (charcoal canisters cannot be repaired).
