F 250 2WD Pickup V8-5.4L CNG VIN M (1999)
Fuel Temperature Sensor: Description and Operation
WARNING
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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 5.4L F250 NATURAL GAS VEHICLE, 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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IT IS IMPORTANT THAT YOUR NATURAL GAS VEHICLE BE CORRECTLY MAINTAINED BY FORD NATURAL GAS
TRAINED PERSONNEL. IF A CONCERN OCCURS, IT IS IMPORTANT THAT CORRECTLY TRAINED PERSONNEL
DIAGNOSE THE CAUSE. IF THE PROBLEM RELATES TO THE FUEL SYSTEM, PROPER PART REPLACEMENT IS
IMPERATIVE TO KEEP YOUR VEHICLE OPERATING AT NORMAL PERFORMANCE. NATURAL GAS COMPONENTS AND
GASOLINE FUEL COMPONENTS ARE NOT INTERCHANGEABLE. IF YOUR VEHICLE IS NOT REPAIRED IN ACCORDANCE
WITH NATURAL GAS-FUELED VEHICLE PROCEDURES, DAMAGE CAN OCCUR AND YOUR WARRANTY MAY BE
INVALIDATED.
NOTE: All standard production components and systems receive routine repairs under base warranty procedures
Engine Fuel Temperature Sensor
The engine fuel temperature sensor is located on the fuel injection supply manifold, and is used to provide a signal to the powertrain control module
that indicates the temperature of the fuel in the fuel injection supply manifold.
Fuel Tank Temperature Sensor
The tank temperature sensor:
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changes resistance in response to the temperature of the fuel in the fuel tank; as the surrounding temperature increases, the resistance decreases
(the voltage signal also decreases).
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provides a signal to the NGV module that indicates the temperature of the fuel.
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is mounted in the high-pressure fuel line downstream of the coalescer filter.
