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Home >> Jeep >> 2023 >> Wagoneer Carbide, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (6.4L - Engine (Service Information) (3 Of 3)) >> Fuel System >> Standard Procedure >> Draining Fuel Tank >> Conventional Procedure

Conventional Procedure

WARNING: This page is about a different car, the 2023 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
GC0185949Courtesy of CHRYSLER GROUP, LLC
1 - Fuel Line Quick Connect Fitting
WARNING:

The fuel system may be under constant fuel pressure even with the engine off. This pressure must be released before servicing the fuel tank.

Due to a one-way check valve installed into the fuel fill fitting at the tank, the tank cannot be drained at the fuel fill cap.

  1. Perform the fuel system pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE  .
  2. Disconnect the fuel supply line from the fuel rail. Refer to QUICK-CONNECT FITTINGS  .
    GC0143911Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Tool number 8978-2 is used on 5/16" fuel lines while tool number 8531-1 is used on 3/8" fuel lines.

  3. Install the appropriate fuel line adapter fitting from the Decay Tool, Fuel 8978A to the fuel supply line. Route the opposite end of this hose to an OSHA approved fuel storage tank such as the John Dow Gas Caddy 320-FC-P30-A or equivalent.
  4. Using a diagnostic scan tool, activate the fuel pump until the fuel tank has been evacuated if there is an actuator available. If there is no actuator in the scan tool, the fuel pump relay must be jumped and activated to run the pump. Use the wiring information to determine how the fuel pump relay is controlled and jump the relay to activate the pump.