F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
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Fuel Gauge Sender: Description and Operation
Bi-Fuel LPG Models
FUEL LEVEL FLOAT
A float-style fuel level sending unit is mounted in the alternative fuel tank. The compuvalve receives input from the fuel level float and sends a signal to
the base gasoline fuel gauge representing the level of liquid propane.