Vehicles Without Fuel Rail Test Port
- Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Fuel pressure gauge is installed between fuel supply line and fuel line fitting on fuel rail.
- To disconnect fuel supply line from fuel rail, ensure area around fuel supply line and fuel rail are clean. Note direction of latch clip installation. Latch clip is located on top of fuel supply line at fuel rail. See Fig 1
. Using 2 screwdrivers, pry latch clip upward, and remove from fuel rail.
- Pull fuel supply line from fuel rail. Install Adapter (6923) into fuel rail. Ensure adapter is fully seated in fuel rail. Install latch clip into fuel rail, with latch clip fingers pointing downward. If latch clip will not fully seat so latch clip fingers extend downward below fitting on fuel rail, adapter may not be fully seated in fuel rail.
- Connect fuel supply line to adapter. Ensure fuel supply line fully seats in adapter. Remove protective cap from test port, and install Fuel Pressure Gauge/Hose (5069) at test port.
- Start engine and allow to idle. Fuel pressure should be 44-54 psi (3.1-3.8 kg/cm2
). If no fuel pressure exists and engine will not start, fuel pump relay and control circuit may be defective. See FUEL PUMP RELAY under FUEL SYSTEM.
- If fuel pressure exceeds specification, fuel pump is okay, but fuel pressure regulator is defective. Replace fuel pressure regulator. Fuel pressure regulator is incorporated with the fuel filter. Fuel filter/fuel pressure regulator is located on top of fuel tank, at fuel pump module. See appropriate REMOVE/INSTALL/OVERHAUL
- 5.9L article.
- Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Remove latch clip. Remove test equipment. Before reinstalling fuel supply line, ensure fuel supply line fitting and fitting on fuel rail are clean.
- Lubricate fuel supply line fitting and fitting on fuel rail with engine oil. Install fuel supply line on fuel rail.
- Install latch clip into fuel rail, with latch clip fingers pointing downward. Ensure latch clip is fully seated. Latch clip fingers should extend downward below fitting on fuel rail when fully seated.
- Pull on fuel supply line to ensure fuel supply line is fully locked on fuel rail. Reinstall negative battery cable. Start engine and check for fuel leaks.
Courtesy of CHRYSLER CORP