Current evaporative emission (EVAP) systems are fully closed to maintain stable fuel tank pressure and virtually eliminate leakage of fuel vapors into the atmosphere.

Question

Quizplus · Accepted Answer

Modern evaporative emission (EVAP) systems are designed to be fully closed systems that capture fuel vapors from the fuel tank and store them in a charcoal canister until they can be purged and burned in the engine during normal operation, significantly reducing fuel vapor emissions into the atmosphere.

Current Evaporative Emission (EVAP) Systems Are Fully Closed to Maintain