Evaporative Check Valve: Service and Repair

REMOVAL

WARNING
^ THE EVAPORATIVE EMISSION SYSTEM CONTAINS FUEL VAPOR AND CONDENSED FUEL VAPOR. ALTHOUGH NOT PRESENT IN LARGE QUANTITIES, IT STILL PRESENTS THE DANGER OF EXPLOSION OR FIRE. DISCONNECT THE BATTERY GROUND CABLE FROM THE BATTERY TO MINIMIZE THE POSSIBILITY OF AN ELECTRICAL SPARK OCCURRING, POSSIBLY CAUSING A FIRE OR EXPLOSION IF FUEL VAPOR OR FUEL LIQUID IS PRESENT IN THE AREA.
^ DO NOT SMOKE OR CARRY LIGHTED TOBACCO OR OPEN FLAME OF ANY TYPE WHEN WORKING ON OR NEAR ANY FUEL RELATED COMPONENT. HIGHLY FLAMMABLE MIXTURES ARE ALWAYS PRESENT AND MAY BE IGNITED, RESULTING IN POSSIBLE PERSONAL INJURY.
^ THE ELECTRICAL POWER TO THE AIR SUSPENSION SYSTEM MUST BE SHUT OFF PRIOR TO HOISTING, JACKING OR TOWING AN AIR SUSPENSION VEHICLE. THIS CAN BE ACCOMPLISHED BY TURNING OFF THE AIR SUSPENSION SWITCH LOCATED IN THE RH KICK PANEL AREA. FAILURE TO DO SO MAY RESULT IN SHIFTING OF THE VEHICLE DURING THESE OPERATIONS.

1. Drain the fuel tank.
2. Raise and support the vehicle.
3. Remove the fuel tank.







4. Remove the fuel vapor control valve tube assembly.
^ Apply upward pressure on the fuel vapor vent valve.
^ Remove the fuel vapor control valve tube assembly.

CAUTION: The fuel vapor control valve tube assembly and the fuel vapor control valve are removed as one piece. Do not attempt to separate.







5. Remove the fuel vapor control valve.
^ Push down and rotate counterclockwise.
^ Remove the fuel vapor control valve.

INSTALLATION

NOTE: Lubricate all O-rings with ESE-M99B144-B Merpol or equivalent.







1. To install, reverse the removal procedure.
2. Leak test the system.
3. Perform the Evaporative Emission Running Loss Monitor Repair Verification Drive Cycle.