Forenza L4-2.0L (2004)
Fuel Pressure: Testing and Inspection
Fuel System Diagnosis
Circuit Description
The fuel pump is an in-tank type mounted to a fuel sender assembly. The fuel pump will remain on as long as the engine is cranking or running and the
Engine Control Module (ECM) is receiving reference pulses from the crankshaft position (CKP) sensor. If there are no reference pulses, the ECM will
turn off the fuel pump two seconds after the ignition switch is turned ON or two seconds after the engine stops running. The fuel pump delivers fuel to
the fuel rail and the fuel injectors, where the fuel system pressure is controlled from 379 to 393 kPa (55 to 57 psi) by the fuel pump assembly. The
excess fuel is returned to the fuel tank.
WARNING:
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The fuel system is under pressure. To avoid fuel spillage and the risk of personal injury or fire, it is necessary to relieve the fuel system
pressure before disconnecting the fuel lines.
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Do not pinch or restrict nylon fuel lines to avoid damage that could cause a fuel leak, resulting in possible fire or personal injury.
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