Civic L4-1.7L CNG (2003)
Fuel Pressure Control Solenoid: Description and Operation
Fuel Tank
Fuel Tank Regulator P1
Fuel Pressure Regulator Shut-Off Solenoid Valve/Fuel Tank Internal Solenoid Valve
The fuel tank internal solenoid valve is located in the fuel tank, it turns ON or OFF to supply the fuel to the engine.
The fuel pressure regulator shut-off solenoid valve is located on the fuel pressure regulator P1, and it turns ON or OFF to supply fuel to the engine.
When the ignition switch is turned ON (II), the fuel tank internal solenoid valve and the fuel pressure regulator shut-off solenoid valve normally open for
two seconds.