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FUEL SYSTEM/ENGINE MANAGEMENT 9
Evaporative Control System — Engine Running
When the engine is started, vacuum is applied via
pipe C to the vacuum switch on the canister,
causing the canister valve to open.
Direct return of vapour to the idle control housing
is prevented by the purge control valve which is
governed by the engine management system
ECM.
The purge control valve is shuttled between the
open and closed position during purging to
prevent transient rich mixture and high emissions.
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