Volkswagen Golf, GTI, Jetta 1999-2004, Jetta Wagon 2001-2004 - 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AWD, AWW, AWP
When the oxygen sensor control is active when driving
(engine warm), the EVAP canister purge regulator valve
-N80-, is activated (pulsed) from the engine control
module depending upon load and engine speed. The
opening period is dependent on the input signals.
Intake manifold vacuum draws fresh air through the vent
opening on the underside of the EVAP canister during
the purging procedure (regenerating the activated
charcoal in the canister). The fuel vapors stored in the
activated charcoal and fresh air are pulse-fed for
combustion.
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