Ford Falcon. Manual — part 180

303-04c-8 Single

Fuel

LPG 303-04c-8

DESCRIPTION AND OPERATION (Continued)

Ute

Sedan and Wagon

Ute

Sedan

Wagon

Description

The LPG fuel option utilises a VIALLE LPG system

specifically engineered to suit the Ford 4 Litre engine.

The LPG control system is fully integrated into the

vehicles Power Control Module (PCM).
Sedan and wagon units have two cylinders that are

joined together through a manifold to form 1 storage

tank that uses single filler hose. The tank has

Automatic Fill Limiter (AFL), a non-return valve, a

Service valve (incorporating an electric

solenoid-activated Lock Off), and a fuel gauge with a

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303-04c-9 Single

Fuel

LPG 303-04c-9

DESCRIPTION AND OPERATION (Continued)

sender unit. The sender unit gives normal operation of state changes to a gas and in so doing, expands

the fuel gauge mounted in the instrument cluster .

approximately 270 times its original liquid volume.

This property results in a fuel that combines the

The Ute has two cylinders that form two separate

compactness of a liquid for storage and combustion

tanks and uses a single filler hose. Each tank has

properties of a gas when mixed with air.

Automatic Fill Limiter (AFL), a non-return valve, a

Service valve (incorporating an electric

Pressure vs. Temperature

solenoid-activated Lock Off), and a fuel gauge with a

At 20

°C LPG must be stored at approximately 750

sender unit. The sender unit gives normal operation of

kPa to remain as a liquid. This pressure is used to

the fuel gauge mounted in the instrument cluster. The

push LPG through the fuel line to the engine bay to

liquid line has a hydrostatic valve on the Ute.

the converter - a Fuel Filter and Lock Off is installed

Also for all variants included in the system is a second

prior to the Converter. The pressure inside the fuel

Filter/Lock Off, Converter Unit and a Gas/Air Mixer,

tanks varies with ambient temperature, as ambient

which is in the engine throttle body with a filtered air

temperature increases to 40

°C the vapour pressure

supply through the vehicle’s special for LPG air

increases to approximately 1280 kPa

cleaner.

Operating Principles
Liquid Petroleum Gas (LPG) is a hydrocarbon fuel

similar to petrol and consists primarily of Propane and

Butane. The mix will vary by location and source. For

reasons of safety an additive is introduced to LPG

that produces a strong odour to aid in leak detection.

LPG is heavier than air, and will settle in low areas

such as service bay pits, etc. Any leaks will not readily

be dispersed and extreme care must be taken to

prevent ignition of the gas if a leak does occur. LPG

boils between -40

°C and -9°C depending on actual

mixture of propane and butane (at atmospheric

pressure) and therefore must be pressurised to

approximately 750 kPa to maintain it in a liquid state.

When subjected to atmospheric pressure the liquid

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303-04c-10

Single Fuel LPG

303-04c-10

DESCRIPTION AND OPERATION (Continued)

Item

Description

Item

Description

9

LPG Intake Manifold

1

LPG Liquid Line

10

10.7:1 Compression Ratio Pistons

2

Coolant Hoses

11

Green Rocker Cover

3

Cooler Temp. LPG Spark Plugs

12

Spark Plug Cover with LPG Clip

4

LPG Vacuum Tree

13

Balance Hose

5

Fuse & Relay

14

Vapour Hose

6

Electronic Throttle Body with LPG Venturi

15

LPG Oil Cap Designating 15W 40 Oil

7

Unique PCV Hose

16

LPG Converter

8

Air Cleaner with Paper Element, Coil

Spring Clips and a Balance Hose Tube

17

Converter Bracket

and Connector

18

Exhaust Manifold Heat Shield

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303-04c-11

Single Fuel LPG

303-04c-11

DESCRIPTION AND OPERATION (Continued)

LPG System Major Components

Sedan

Fuel Tank

The LPG fuel tanks are thick walled steel cylinders

built to safety standards. They are mounted to the

chassis.
NOTE: The tanks are heat treated in manufacture and

must not be welded or treated in any way during

installation or servicing.

Sedan

Item

Description

1

Pressure relief valve

2

Fuel contents gauge with sender unit

3

AFL (Automatic Fill Limiter)

Supply fuel to the engine through pick up filter

and lock off.

Sedan

Item

Description

1

Valve pad (see AUS00139)

2

Cylinders

3

Service valve

4

Stone shield

5

Service line

Sedan

Measure fuel level.
Relieve excess vapour pressure should it rise to a

high level.

Variant

80% of Total Capacity

(AFL)

Sedan

93 litres of LPG

Wagon

116 litres of LPG

Ute

92 litres of LPG

Each tank has the following components:

Each tank has four openings that are used to:

Automatic Fill Limiter, which incorporates a

Fill the tank with LPG and stop the fill when the

non-return valve.

tank has reached 80% of total capacity (AFL).

Service valve incorporating an electric solenoid

actuated shut off valve.
Fuel contents gauge with sender unit.
Pressure relief valve.

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