F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Fuel System - LPG
Removal
Installation
OVERVIEW
The affected vehicles will require the replacement of the compuvalve. This procedure gives detailed instructions for replacing the compuvalve on both
Compressed Natural Gas (CNG) and Liquid Propane Gas (LPG) BI-fuel systems. To ensure leak-proof connections, new copper washers (supplied with
the compuvalve) and a new fuel line clamp (not supplied with the compuvalve) must be used. Prior to beginning this procedure, read all of the warnings
applicable to the type of fuel system you are working on.
CNG
WARNING!
DO NOT MODIFY THE SYSTEM CONFIGURATION OR COMPONENTS OR REPLACE COMPONENTS WITH COMPONENTS NOT
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) DOWN STREAM OF THE FUEL PRESSURE
REGULATOR AND UP TO 24,821 KPA (3,600 PSI) UP STREAM 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.
LPG
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
