Fuel Tank Pressure Control Valve
- Remove valve from vehicle. Using a hand-held vacuum pump, apply 15 in. Hg to the upper trigger port. Vacuum should hold for 20 seconds. If it does not hold, replace valve.
- Install a short length of hose to the valve tank vent tube. Lightly blow into hose. Valve should pop open and air should pass through valve. If the valve does not pop open, replace valve.