Ford F150 Pickup. Instruction — part 1134

This section covers general procedures related to the bi-fuel components of the fuel system.

Always refer to the Master Parts Catalog for parts usage before installing any component of the bi-fuel fuel
system.

FUEL SYSTEM - NATURAL GAS

When servicing the fuel system, observe the following information:

WARNING:

Do not modify the system configuration or components or replace
components with components no specifically designed for use with
natural gas. Ford Motor Company has specifically designed the materials,
components and system configuration for the 5.4L F-Series Bi-Fuel
vehicle, and each particular system is precisely calibrated for efficient
operation. The use of different parts or materials can produce an untested
configuration that can result in fire or personal injury or cause engine
damage.

WARNING:

It is important that your bi-fuel vehicle be correctly maintained by Ford bi-
fuel trained personnel. If a concern occurs, it is important that correctly
trained personnel diagnose the cause. If a concern relates to the fuel
system, correct part replacement is imperative to keep your vehicle
operating at normal performance. Bi-fuel components and gasoline
specific components are not interchangeable. If your vehicle is not
serviced in accordance with bi-fuel service procedures, damage can
occur and your warranty may be invalidated.

WARNING:

Fuel supply lines are always pressurized. When servicing fuel related
components, do not smoke or carry lighted tobacco or an open flame of
any type. Flammable mixtures may be present and can ignite, resulting in
personal injury.

WARNING:

The natural gas fuel system is always pressurized to 655 kPa (95 psi)
downstream of the fuel pressure regulator and up to 24821 kPa (3600 psi)
upstream of the fuel pressure regulator. Use care when servicing the fuel
system or personal injury can occur.

WARNING:

The natural gas fuel supply manifold is pressurized to 655 kPa (95 psi).
Fuel pressure must be relieved prior to any fuel system service.

WARNING:

The fuel system pressure must be relieved before any component can be
removed. The fuel tanks must be evacuated prior to tank removal.
Removal of components without pressure relief or tank evacuation can
cause natural gas to escape into the air and cause injury or death.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup

z

All 5.4L engines equipped with the propane bi-fuel option are equipped with closed-type positive
crankcase ventilation (PCV) system and an exhaust emission system to control engine emissions within
government specifications.

z

To maintain the required exhaust emission levels, the fuel system must be kept in correct operating order.

z

The bi-fuel fuel system must be adjusted to the specifications.

This section covers general procedures related to the bi-fuel components of the fuel system.

Always refer to the Master Parts Catalog for parts usage before installing any component of the bi-fuel fuel
system.

Typical Vent Stack Installation

Refer to Fig. 2 for a typical vent stack installation.

NOTE:

Local regulations must be followed on installing vent stacks. Regulations vary
from state to state and country to country. Contact your local gas utility for
further details.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup

Fig. 2: Identifying Vent Stack
Courtesy of FORD MOTOR CO.

DIAGNOSIS AND TESTING

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup

FUEL SYSTEM - BI-FUEL SYSTEMS

Refer to SELF-DIAGNOSTICS - BI-FUEL - GASOLINE/LPG .

GENERAL PROCEDURES

PRESSURE RELIEF - LIQUID PROPANE GAS BI-FUEL SYSTEM

WARNING:

Avoid inhaling propane gas or occupying confined areas containing
propane. Propane is heavier than air. The heavier gas can displace or
push fresh air out of an area. In large quantities, propane can displace
enough oxygen to make the surrounding air unfit to breathe and possibly
cause illness. If a person breathes propane gas or air that lacks oxygen
due to the presence of propane gas, headache, dizziness, and weakness
in the extremities can occur. In severe cases, prolonged breathing of
propane-fouled air can cause suffocation. In the event of illness from
inhaling propane gas, move the victim immediately to fresh air and
contact a physician or medical emergency personnel for artificial
respiration or other required treatment.

WARNING:

Do not needlessly vent propane fuel during service, and do not open the
80% stop-fill valve while a vehicle is inside a building. When servicing the
fuel system, follow the recommended procedures to shut off the fuel
tanks and run the engine out of fuel before disconnecting the fuel system
components. If the fuel tank(s) are being serviced, have the fuel
evacuated by trained personnel at a local propane fuel station. Liquid
propane fuel vaporizes at normal barometric pressure at temperatures
above -42°C (-44°F), and expands to 270 times its volume as a liquid.
Unnecessary venting of propane fuel can create fire and health hazards
which could cause personal injury or death.

WARNING:

Be alert for situations that may cause the propane fuel system to vent
fuel. These include extremely hot days, parking near a space heater, or
hoisting a vehicle up near a ceiling heater. Release of propane fuel in a
confined area through the pressure relief valve could occur. The release
of propane fuel in a confined area could result in an accumulation of
flammable vapors. If fuel is vented near a heat source, a fire or explosion
could occur.

WARNING:

Do not use paint drying ovens for propane fueled vehicles. The heat of
paint drying ovens will increase the pressure in the fuel tanks. This could
cause venting of propane fuel vapor into the oven and result in a fire from
the heat or sparks in the electrical equipment. If the fuel is confined inside
an oven an explosion may occur. When refinishing the body panels of a
propane fueled vehicle use spot painting and drying methods.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup