Allow the vehicle to sit for at least 10 minutes. The 7.3L diesel engine fuel system will internally relieve system fuel pressure after approximately 10 minutes.
- Before servicing the vehicle, refer to the Precautions Section.
- Remove the fuel tank filler cap to relieve any pressure in the fuel tank.
- When servicing the fuel lines, loosen the fuel fitting to allow any residual fuel line pressure to be relieved.