2004 FORD E SERIES compression ratio

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.
Servicing your vehicle
6

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
Servicing your vehicle
7

2.Isolation solenoid valve -Blocks flow from the injection manifold
when the engine is off.
3.Engine -Is a modified 4.6L engine with Sequential Electronic Fuel
Injection (SEFI) and increased compression ratio.
4.Engine coolant lines -Provide required heat to high pressure
regulator.
5.Powertrain control module -Required for NGV application.
6.Sealed vent box -Vented to underbody. Dispenses natural gas vapor
to atmosphere if vapor becomes present.
7.Tank pressure sensor -Fuel tank pressure sensor located in this
tank’s solenoid valve is used for fuel indication.
8.Solenoid tank valves -One solenoid per tank. Internal valves with
shut-off solenoids wired into inertia circuit for crash protection.
9.Two fuel tanks -Located in the trunk. On taxi or police vehicles, an
extended range fuel system is available which includes one additional NG
fuel tank mounted in the trunk (total of three).
10.Fueling point -Fueling receptacle is conveniently located with the
fuel door. Same location as gasoline fueled vehicles.
11.Tank shield-Protective shield able to prevent damage to the fuel
tanks caused by trunk cargo.
12.Tank temperature sensors -One each in set of tanks (solenoid
valves) used for fuel indication.
13.Optional fuel tank -A fiber-wrapped steel fuel tank (total of three
tanks in the trunk). Also has a sealed vent box which vents to the
underbody. Dispenses natural gas vapor to the atmosphere if vapor is
present.
14.Two fuel tanks -Located underbody to facilitate fuel system design.
15.Stone and heat shield -Protective shield able to prevent damage to
the fuel tanks caused by road debris or other road hazards.
16.High pressure fuel lines -Delivers high pressure fuel to the
pressure regulator.
17.Pressure regulator and coalescent fuel filter assembly -
Reduces the fuel pressure to the fuel injector.
18.Low pressure fuel lines -Supplies natural gas to the engine.
19.Fuel rail sensors -One injection pressure sensor and one engine
fuel temperature sensor provide engine fuel information to the PCM.
Servicing your vehicle
9

indication that refueling is nearly complete. Also, the station compression
equipment may turn on at any time during the refueling process.
FUEL QUALITY
Do not use liquefied natural gas (LNG) or a CNG that is derived
from a process such as flashing (heating LNG). Failure to use the
correct type of fuel may cause damage to the engine and fuel
system components.
Use only a CNG fuel that meets the specification of NFPA-52 and SAE
J1616 in your NGV. Specifications NFPA-52 and SAE J1616 place limits
on particulate contamination, oil contamination and moisture content to
ensure a quality CNG fuel.
The use of a CNG fuel that does not meet specifications NFPA-52 and
SAE J1616 isnot recommended and may cause engine damage.
Use of poor quality CNG fuel may result in:
• component failure.
• leakage from the fueling point.
• poor vehicle operation.
Use of poor quality fuel may also result in your warranty being
invalidated.
Icing while fueling your vehicle
An icing condition may occur after fueling your vehicle. This may be due
to changes in fuel moisture content, quite often seen during change of
seasons. This condition causes your vehicle ’s fuel fill valve to remain
slightly open, allowing some natural gas to be released.
Breathing hydrocarbon gases (CNG) or air which lacks oxygen
due to the presence of hydrocarbon gases can result in
headache, dizziness and weakness in the arms and legs. In the event of
illness due to inhaling hydrocarbon gases, immediately move the victim
to fresh air and contact medical emergency personnel.
The icing condition may be observed when disconnecting the fuel
dispenser ’s fill nozzle from your vehicle. You may notice more gas than
normal venting from the vehicle fill valve through the vent hose to the
dispenser. If this occurs, keep the fill nozzle connected (or reconnect it)
and wait about 30 seconds. This will allow the ice to melt. Repeat this
procedure as necessary. When normal fuel venting occurs, remove the fill
nozzle and stow it as instructed on the dispenser.
Do not fuel your vehicle with the ignition in the ON position; doing so
may increase the amount of fuel venting during this icing condition.
Servicing your vehicle
11