Ford F150 Pickup. Instruction - part 1136

Fig. 6: Locating Fuel Tank Shield Bolts 
Courtesy of FORD MOTOR CO. 

3. Disconnect the connectors. 

 

2003 Ford Pickup F150 

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

  

Fig. 7: Disconnecting connectors 
Courtesy of FORD MOTOR CO. 

4. Set the fuel selector switch to "ALT" and run the vehicle until the indicator lamp goes out. 

 

2003 Ford Pickup F150 

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

  

Fig. 8: Locating Fuel Selector Switch 
Courtesy of FORD MOTOR CO. 

5. To pressurize the system, reverse the procedure.  

FUEL TANK EVACUATION - LIQUID PROPANE GAS 

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 

 

2003 Ford Pickup F150 

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

  

1. Relieve the propane fuel system pressure. Refer to PRESSURE RELIEF - Liquid Propane Gas Bi-

Fuel System . 

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.

WARNING:

If a confined area, such as a lubrication pit, has been subjected to 
propane gas the area should be inspected for adequate oxygen levels by 
a local health department before being entered or personal injury or death 
may occur.

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 propane fuel to escape into the air and cause injury or death.

NOTE:

In high ambient temperatures, such as those experienced in desert locations, 
the fuel system is designed to vent excess fuel vapor pressure. The pressure 
relief valve will vent fuel and automatically reset itself.

NOTE:

If no approved propane holding tank is available at the repair facility have the 
tanks evacuated by an approved local propane distributor.

NOTE:

This step must be carried out outside, and according to local regulations.

 

2003 Ford Pickup F150 

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