Transfer Flow TRAXUFS User's Manual And Reference page 8

Q
— I have filled both tanks to the top, but one of the tanks does not display
the correct gallonage at full (i.e. the vehicle has a 35 gallon fuel tank but the LCD
reads only 21). What is the problem?
A
— Locate the sending unit on the tank that does not read correctly. Is the sending unit
installed correctly? If it is the Transfer Flow tank, check the orientation of the arrow that
is stamped in the top plate of the sending unit. The Transfer Flow instruction sheet will
tell you how to correctly install the sending unit. Locate the computer module under the
dash, and verify the year make, model, main tank and auxiliary tank size printed on the
label matches the vehicle. If not, call Transfer Flow at (530) 893-5209.
Q
— I just had a Transfer Flow auxiliary fuel tank system installed on my 1999
- 2002 Ford diesel vehicle. I notice that when I turn the key to the "ON" position
(with the engine off) the Trax-UFS dash mounted LCD turns on for a few seconds
and then loses power. Is this normal?
A
— Not to worry. The Transfer Flow auxiliary fuel system gets its power from the
OEM fuel pump. On 1999 - 2002 Fords, the fuel pump only receives continuous power
when the engine is running. If the key is on the "ON" position, the pump will receive
power for a short time and then it will turn off. When the fuel pump loses power, the
Transfer Flow system loses power. If you are unable to start the vehicle but want to
make sure that the Transfer Flow system is operating correctly, continue to turn the key
to the "OFF" position and then back to "ON".
Notice For Early 2000 Model Year F350-550 Ford Cab Chas-
sis Owners With 40 Gallon Aft Axle Tank
The Trax-UFS computer system utilizes the OEM sending unit to determine the level of fuel
in the OEM tank. Due to the design of the OEM fuel sender, the LCD and fuel gauge will
not seem to function after a fill up for as long as 200 miles. After using six to eight gallons
of fuel, the LCD and gauge should become accurate again.
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