RAM 2500 Van V8-5.9L VIN Z (1997)
Fuel Pressure Release: Service and Repair
With Pressure Test Port
Fig. 7 Fuel Pressure Test Port - Typical
Fuel Pressure Release Procedure - Typical
NOTE: The fuel pressure test port is used on certain engines only. If equipped, the test port will be located on the fuel rail near the throttle position
sensor. A sealing cap is screwed onto the test port.
The fuel system is under constant fuel pressure (even with the engine off).
WARNING: Because the fuel system is under constant fuel pressure, the pressure must be released before servicing any fuel system component.
This does not apply to throttle body removal.
1. Disconnect negative battery cable.
2. Remove the fuel tank filler tube cap to release fuel tank pressure.
3. Remove protective cap from pressure test port on the fuel rail. This is located on top of fuel rail near the throttle position sensor.
WARNING: Do not allow fuel to spill onto the engine intake or exhaust manifolds. Place shop towels under and around the pressure port to
absorb fuel when the pressure is released from the fuel rail.
WARNING: Wear proper eye protection when releasing fuel system pressure.
4. Obtain the fuel pressure gauge/hose assembly from fuel pressure gauge tool set 5069. Remove the gauge from the hose.
5. Place one end of hose (gauge end) into an approved gasoline container.
6. Place a shop towel under the test port.
7. To release fuel pressure, screw the other end of hose onto the fuel pressure test port.
