Fuel System Pressure Release - Gasoline Engines

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury.

WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before servicing or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to prevent accidental spraying of fuel, causing personal injury or a fire hazard.

With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING AND LIFTING .
Disconnect the fuel pump module electrical connector.

Fig 1: Disconnecting Fuel Pump Module Electrical Connector
Courtesy of FORD MOTOR CO.
Start the engine and allow it to idle until it stalls.
After the engine stalls, crank the engine for approximately 5 seconds to make sure the fuel rail pressure has been released.
Turn the ignition switch to the OFF position.
When fuel system service is complete, connect the fuel pump module electrical connector.

Fig 2: Connecting Fuel Pump Module Electrical Connector
Courtesy of FORD MOTOR CO.

NOTE: It may take more than one key cycle to pressurize the fuel system.

Cycle the ignition key and wait 3 seconds to pressurize the fuel system. Check for leaks before starting the engine.
Install the diagnostic tool. Turn the key ON with the engine OFF. Cycle the key OFF, then ON. Select the appropriate vehicle and engine qualifier. Clear all diagnostic trouble codes (DTCs) and carry out a PCM reset.
Start the vehicle and check the fuel system for leaks.