Fuel Filler Cap
Fuel Filler Cap Operation:
The fuel filler cap should vent internal pressure at or under 1.5 psi to maintain tank structural integrity. The cap is also required to allow outside air to enter when a vacuum exists in the fuel tank.
The fuel filler cap should vent internal pressure at or under 1.5 psi to maintain tank structural integrity. The cap is also required to allow outside air to enter when a vacuum exists in the fuel tank.