Evaporative Emissions - Chrysler 2005 Crossfire SRT6 Service Manual

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EVAPORATIVE EMISSIONS

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EVAPORATIVE EMISSIONS
DESCRIPTION - EVAPORATION CONTROL SYSTEM
The Evaporation Control System prevents the emission of fuel tank vapors into the atmosphere. When fuel evap-
orates in the fuel tank, the vapors pass through vent hoses or tubes to an activated carbon filled evaporative can-
ister. The canister temporarily holds the vapors. The Powertrain Control Module (PCM) allows intake manifold
vacuum to draw vapors into the combustion chambers during certain operating conditions.
This vehicle uses a pulse-width modulated EVAP Purge Solenoid System. The PCM controls vapor flow by oper-
ating the EVAP Purge Solenoid. Refer to EVAP Purge Solenoid in this section.
Note: The evaporative system uses specially manufactured hoses. If they need replacement, only use fuel
resistant hose. Also the hoses must be able to pass an Ozone compliance test.
Note: For more information on Onboard Refueling Vapor Recovery (ORVR), refer to the Fuel Delivery
section.
CHARCOAL CANISTER SHUTOFF VALVE
DESCRIPTION
The Charcoal Canister Shutoff Valve is part of the Evaporative Vacuum Leak Detection (EVLD) system. The Char-
coal Canister Shutoff Valve is mounted on the EVAP Canister. This assembly is located above a splash shield in
front of the right rear axleshaft.
OPERATION
The Charcoal Canister Shutoff Valve is actuated by the PCM to isolate the EVAP Purge System in order to deter-
mine if a leak exists in any of the purge system components.