EVAP Purge Solenoid: Operation

The PCM will only energize the EVAP solenoid when the engine is at operating temperature, but will de-energize it during periods of deceleration. When de-energized, no vapors are purged.

The pulse-width modulated EVAP Purge Solenoid controls the fuel vapor purge rate from the Vapor Canister and fuel tank to the engine intake manifold.