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
.
- Relieve fuel pressure. Stop fuel system actuation test. Ensure fuel tank is at least 1/2 full before performing following test.
- Disconnect fuel return line 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 test. Observe fuel pressure gauge. If fuel pressure is 12-16 psi (AN body) or 35-45 psi (AS body), repair fuel return line for a restriction at fuel tank. Perform VERIFICATION TEST VER-2 . If fuel pressure is not 12-16 psi (AN body) or 35-45 psi (AS body), go to next step.
- Using DRB-II, stop fuel system actuation test. Relieve fuel pressure. Reconnect fuel return line to fuel tank. Disconnect fuel return line from throttle body. Attach Fuel Pressure Test Adapter (6541) to fuel return line fitting at throttle body. 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 and observe fuel pressure gauge. If fuel pressure is 12-16 psi (AN body) or 35-45 psi (AS body), repair restricted fuel return line to fuel tank; if fuel pressure is not 12-16 psi (AN body) or 35-45 psi (AS body), replace fuel pressure regulator. Perform VERIFICATION TEST VER-2 .