Ford 2004 Mustang Owner's Manual page 6

Servicing your vehicle
E-450 Cutaway
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 fuel 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. Extended range fuel tank - An optional steel fuel tank located in
the cargo area.
6. Sealed vent box - Dispenses natural gas vapor to atmosphere if
vapor becomes present.
7. Internal tank valve - One electronically actuated, normally closed
solenoid valve is located in each fuel tank. The valve is wired into the
vehicle's inertia switch. If the engine cranks but does not start after a
collision, the fuel solenoid valve inertia switch may have been activated.
The inertia switch is a device intended to close the fuel solenoid valve
when your vehicle has been involved in a substantial jolt.
8. Stone shield(s) - Protective shield(s) to prevent damage to the fuel
tank(s) caused by road debris or other road hazards.
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