Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 566 (FUEL SYSTEM-GENERAL INFORMATION)DESCRIPTION AND OPERATIONFUEL SYSTEM
2009 Mercury Milan Premier, 3.0 1, AWD
Fuel System
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Fuel System
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. 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 components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions can result in personal injury.
- 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 components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions can result in personal injury.
The fuel system consists of the:
- fuel tank.
- fuel tank filler pipe.
- fuel pump module.
- fuel level sensor.
- fuel tubes.
- fuel filter.
- fuel injectors.
- fuel rail.
- fuel tank pressure transducer.
- inertia fuel shutoff (IFS) switch.
- fuel injection pressure temperature sensor.
The vehicle:
- uses an electronic returnless fuel system, has a dual-container (saddle-type) fuel tank, has a fuel level sensor in the right fuel tank half.
- has a fuel pump module that supplies fuel under pressure to the fuel rail.
- has a fuel filter located on the passenger side in front of the fuel tank.
- is equipped with a sequential multi-port fuel injection (MFI) system.
- uses separately controlled fuel injectors for each cylinder. The fuel injectors are mounted to the intake manifold.
- fuel injectors are supplied with pressurized fuel from the fuel pump module to the fuel rail.
- fuel injection rail pressure is controlled by the electronic fuel delivery module which is enabled by the powertrain control module (PCM).
- has a fuel tank filler pipe assembly, which cannot be modified in any way and is serviced only by installation of a new fuel tank filler pipe assembly.
- has a fuel injection pressure sensor, which monitors the fuel pressure during running and key on/engine off conditions.
- has an inertia fuel shutoff (IFS) switch located in the passenger side footwell that shuts off fuel in the event of a collision.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.