Gasoline Models
System is designed to route fuel vapor from fuel tank and carburetor into carbon canister where they are stored until intake vacuum draws vapor into combustion chambers for burning.
Components include a sealed filler cap, vapor separator tank (Impulse), check and relief valve (P'UP and Trooper II), charcoal canister and purge control valve, solenoid operated vent switching valve (carbureted engines), relief valve (P'UP and Trooper II), rollover and float valve (P'UP and Trooper II), 2-way valve (Impulse), evaporator valve (Impulse), thermal vacuum valve (I-Mark), tank pressure control valve (I-Mark), and connecting lines and hoses.
The rollover and float valve and relief valves are used to prevent fuel leakage and excessive pressure inside fuel tank in the event of a vehicle rollover. These valves are not relevant to fuel evaporation system.