Checking Fuel Pressure
WARNING:
High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE.
- Using scan tool, stop fuel system actuation. Release fuel pressure. Ensure fuel tank is at least 1/4 full before performing following test. Install fuel pressure gauge and adapter between fuel tank and filter at rear of vehicle.
- Remove fuel return line from fuel pump at fuel tank. Connect Fuel Pressure Test Adapter (6541) to fuel return line. Place other end of adapter hose into an approved 2-gallon gasoline can. Turn ignition on. Using scan tool, actuate fuel system. Observe fuel pressure gauge. See FUEL PRESSURE SPECIFICATIONS table.FUEL PRESSURE SPECIFICATIONS
Application psi (kg/cm(2)) Passenger Car Without Flexible Fuel 34-44 (2.4-3.1) - If fuel pressure is within specification, repair fuel return line for a restriction at fuel tank. Perform TEST VER-2. If fuel pressure is not within specification, stop actuation test. Turn ignition off. Reconnect fuel return line to fuel tank.
- Disconnect fuel return line at throttle body. Connect Fuel Pressure Test Adapter (6541) to fuel return line.
- Place other end of adapter hose into an approved 2-gallon gasoline can. Turn ignition on. Using scan tool, actuate fuel system. Observe fuel pressure gauge. See FUEL PRESSURE SPECIFICATIONS table.
- If fuel pressure is within specification, repair fuel return line for a restriction to the fuel tank. Perform TEST VER-2. If fuel pressure is not within specification, stop actuation test. Turn ignition off. Replace fuel pressure regulator. Reconnect fuel return line to throttle body. Perform TEST VER-2.