Ford 2004 Mustang Owner's Manual page 7

Servicing your vehicle
9. Aft axle fuel tanks - Two steel fuel tanks located behind the rear axle.
10. Midship fuel tank - A steel fuel tank located underbody.
11. High pressure fuel lines - Delivers high pressure fuel to the fuel
tanks and fuel pressure regulator.
12. Fuel pressure regulator/Coalescent fuel filter - Reduces fuel
pressure and removes impurities from the gas.
13. Low pressure fuel line - Supplies natural gas to the injectors.
14. AFV module - Contains the unique powertrain electronics that are
required for an NGV.
F-150 Heritage Pick-up
1. Fuel rail sensors - An injection pressure sensor and an engine fuel
temperature sensor provide engine fuel information to the powertrain
control module.
2. Isolation solenoid valve - Blocks flow from supply line to injection
manifold when the engine is off.
3. Engine - A modified 5.4L gasoline engine with Sequential Electronic Fuel
Injection (SEFI), an improved valvetrain and a high compression ratio.
4. Powertrain control module - Uniquely calibrated for NGV application.
5. Internal tank valve - One electronically actuated, normally closed
solenoid valve is located in each fuel tank. The valve is wired into the
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