F 150 4WD V8-4.6L VIN 8 (2010)
Fuel Pressure: Testing and Inspection
Fuel System Pressure Test
WARNING: Do not smoke, carry lighted tobacco or have an 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 serious personal injury.
WARNING: Before working on or disconnecting any of the fuel tubes or fuel system components, relieve the fuel system pressure to prevent
accidental spraying of fuel. Fuel in the fuel system remains under high pressure, even when the engine is not running. Failure to follow this
instruction may result in serious personal injury.
WARNING: Do not carry personal electronic devices such as cell phones, pagers or audio equipment 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
serious personal injury.
WARNING: When handling fuel, always observe fuel handling precautions and be prepared in the event of fuel spillage. Spilled fuel may be
ignited by hot vehicle components or other ignition sources. Failure to follow these instructions may result in serious personal injury.
5.4L (3V) engine
1. Remove the air intake resonator assembly bolt and loosen the clamp. Rotate the resonator upward until it stops.
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To install, tighten to 10 Nm (89 lb-in).
4.6L (3V) engine
2. Remove the Evaporative Emission (EVAP) purge valve bracket bolt and position the bracket aside.
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To install, tighten to 10 Nm (89 lb-in).
All engines
3. NOTE: 4.6L (2V) shown, 4.6L (3V) and 5.4L (3V) similar.
Remove the fuel pressure relief valve cap.
