Integra (GS-R) L4-1797cc 1.8L DOHC (VTEC) (1994)
Two-Way Valve: Description and Operation
CONSTRUCTION
The two-way valve consists of a pressure valve and a vacuum valve.
OPERATION
The pressure valve is designed to open when the fuel tank internal pressure has increased over normal pressure and the vacuum valve opens when
a vacuum has been produced in the tank.