940 SE L4-2320cc 2.3L SOHC Turbo VIN 87 B230FT (1991)
Fuel Tank Pressure Release Valve: Description and Operation
PURPOSE
The tank relief valves are located in the fuel filler cap. Two safety valves prevent damage to the fuel system in the event of damage or blockage to
the vent system and hoses.
OPERATION
One valve opens in the event of over-pressure, the other in the event of excessive vacuum in the system.