Fuel System Diagnosis. Chevrolet Corsica 1996

For 1990-2009 cars

(1) | Flexible Hose
(2) | Fuel Hose Pinch Point
(3) | Return Line
(4) | Pressure Line
(5) | Bleed Hose
(6) | Fuel Hose Pinch Point
(7) | Fuel Hose Pinch Point
(8) | Fuel Pressure Gauge Kit J 29658-D
(9) | Quick-Connect Adapters

### Circuit Description

When the ignition switch is turned ON, the Powertrain Control Module (PCM) will turn ON the in-tank fuel pump. The in-tank fuel pump will remain ON as long as the engine is cranking or running and the PCM is receiving reference pulses. If there are no reference pulses, the PCM will turn the in-tank fuel pump OFF 2 seconds after the ignition switch is turned ON or 2 seconds after the engine stops running. The in-tank fuel pump is an electric pump within an integral reservoir. The in-tank fuel pump supplies fuel through an in-line fuel filter to the fuel passage within the lower manifold assembly. The fuel pump is designed to provide fuel at a pressure above the pressure needed by the fuel injectors. A fuel pressure regulator, attached to the lower manifold assembly, keeps the fuel available to the fuel injectors at a regulated pressure. Unused fuel is returned to the fuel tank by a separate fuel return pipe.