F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Fuel Pressure Release: Service and Repair
Standard Models (Non BI-Fuel)
Fuel Line Venting Pressure Relief
Special Tool(s)
SPECIAL TOOL(S)
WARNING:
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THE FUEL SUPPLY LINES WILL REMAIN PRESSURIZED AFTER ENGINE SHUTDOWN. WHEN SERVICING FUEL-RELATED
COMPONENTS, DO NOT SMOKE OR CARRY LIGHTED TOBACCO OR ANY OPEN FLAME OF ANY TYPE. FLAMMABLE
GASES MAY BE PRESENT AND IGNITE, RESULTING IN POSSIBLE PERSONAL INJURY.
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DO NOT MODIFY THE SYSTEM CONFIGURATION OR COMPONENTS, OR REPLACE COMPONENTS WITH PARTS NOT
SPECIALLY DESIGNED FOR USE WITH NATURAL GAS. FORD MOTOR COMPANY HAS SPECIALLY DESIGNED THE
MATERIALS, COMPONENTS AND SYSTEM CONFIGURATION FOR THE NATURAL GAS VEHICLES, AND EACH
PARTICULAR SYSTEM IS PRECISELY CALIBRATED FOR EFFICIENT OPERATION. THE USE OF DIFFERENT PARTS OR
MATERIALS CAN PRODUCE AN UNTESTED CONFIGURATION THAT COULD RESULT IN FIRE OR PERSONAL INJURY, OR
CAUSE ENGINE DAMAGE.
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FUEL LINE VENTING IS REQUIRED PRIOR TO FUEL SYSTEM COMPONENT SERVICE.
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EYE AND EAR PROTECTION ARE REQUIRED TO BE WORN DURING VENTING OR REMOVAL AND INSTALLATION OF
FUEL SYSTEM COMPONENTS.
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THE STATUS (STUCK OPEN, STUCK CLOSED, DOES NOT OPERATE OR GOOD) OF EACH FUEL TANK SOLENOID VALVE
MUST BE IDENTIFIED PRIOR TO VENTING THE FUEL TANKS.
NOTE:
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It is recommended that venting be performed with a vent stack. A typical vent stack installation is shown in the Description and Operation
portion. This is a typical installation only. Any vent stack installation must be approved by local authorities.
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The following procedures are required to be used when venting fuel from the fuel lines to remove the fuel tanks, the fuel lines, the
coalescer/filter assembly, the fuel pressure regulator, the fuel injection supply manifold, the fuel injectors, the fuel pressure relief valve, the
fuel shutoff valve solenoid, the injection pressure sensor or the engine fuel temperature sensor.
