Test NF-3B - Checking Fuel Pressure
WARNING:
High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE procedure in this article.
- Before any repairs or removal of fuel pressure gauge, stop fuel system actuation test. Relieve fuel pressure. Ensure fuel tank is at least 1/2 full before performing following test.
- 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 switch to ON position.
- Using DRB-II, actuate fuel system. Observe fuel pressure gauge. If fuel pressure is 32-49 psi, repair restriction in fuel return line at fuel tank. Perform VERIFICATION PROCEDURE VER-2.
- If fuel pressure is not 32-49 psi, stop fuel system actuation. Relieve fuel pressure. Reconnect fuel return line to fuel tank. Disconnect fuel return line from fuel rail.
- Attach Fuel Pressure Test Adapter (6541) to fuel return line. Place other end of adapter hose into an approved 2-gallon gasoline can. Turn ignition switch to ON position. Actuate fuel system. Observe fuel pressure gauge.
- If fuel pressure is 32-49 psi, repair restricted fuel return line to fuel tank. Perform VERIFICATION PROCEDURE VER-2. If fuel pressure is not 32-49 psi, inspect fuel pressure damper line for restrictions.
- If no restrictions exist, replace fuel pressure regulator. Perform VERIFICATION PROCEDURE VER-2. If restrictions exist, replace fuel pressure damper line. Perform VERIFICATION PROCEDURE VER-2.