B4000 SE Regular Cab 4WD V6-4.0L OHV (1999)
Evaporative Check Valve: Service and Repair
The evaporative emission valve is not a serviceable part. If the valve is damaged, replace the fuel pump.
1. Remove the fuel tank.
CAUTION: The evaporative emission valve must be disengaged from the fuel tank before it can be removed. Rotate the evaporative
emission valve counterclockwise to disengage from the fuel tank. Failure to do so can cause damage to the evaporative emission valve or
the fuel tank.
2. Remove the evaporative emission valve.
1. Slide the clamp away from the evaporative emission valve and remove the evaporative emission return tube.
2. Press down and rotate the evaporative emission valve counterclockwise and remove from the fuel tank.
3. Install in reverse order of removal.
4. Leak test the Evaporative Emissions System.
