Transfer Flow TRAXUFS User's Manual And Reference page 5

Q
— What does the Trax-UFS LCD show me?
A
— The LCD displays the gallons currently in your OEM tank, the gallons in the Transfer
Flow auxiliary tank, the total gallons of both tanks, and the operating status of the vehicle's
fuel system (see Figure 1).
Q
— What is the "Status" of the fuel system?
A
— The "Status" section of the LCD display lets you know what the condition is of the
vehicle's fuel system. In normal operation, the LCD will read "OK". When the system is
transferring fuel to the OEM tank, the LCD will read "PMP ON" (pump on). Seven other
codes can also be displayed under the "Status" section on the LCD. For these additional
codes, see Introduction or Figure 3.
Q
— How accurate are the values on the Transfer Flow Trax-UFS LCD?
A
— Typically, the numbers on the LCD should not vary more than a gallon or two from
what is actually in each tank and, in most cases, are exact. Because the Transfer Flow system
reads the in-tank sending units directly, the system itself is very accurate. However, the
sending units in both the OEM tank and the Transfer Flow tank might have slight inaccuracies
throughout the range, especially near Full or Empty conditions.
Q
— What about my OEM fuel gauge?
A
— The OEM fuel gauge on your dash will now read the vehicle's total fuel capacity (OEM
tank plus auxiliary tank). For example, your vehicle has a total of 70 gallons. With both
tanks full, your OEM fuel gauge should read full. Likewise, when the vehicle's total fuel
capacity is half, with the total fuel in the vehicle equal to 35 gallons, the OEM fuel gauge
should read 1/2. Also, the OEM fuel gauge reads the level of fuel in the main tank as soon
as the ignition is turned on. After about 15 seconds, the Trax-UFS computer takes control
of the fuel gauge and adjusts it to the combined total. For example, if the main tank is full
and the auxiliary tank is empty, then the fuel gauge would go to full then slowly come down
to about 1/2 tank.
Q
— What if I have dual tanks on my vehicle and I install a Transfer Flow fuel
tank system. I now have a total of three fuel tanks. How does the Transfer Flow fuel
system work now?
A
— The Transfer Flow auxiliary tank only transfers fuel to one of the OEM tanks.
Typically, on Ford vehicles, the front OEM tank is the one that is refueled by the Transfer
Flow tank. Whatever the case may be, the dash mounted LCD will ALWAYS display the
values from the Transfer Flow auxiliary tank and the OEM tank that is being refueled by
C
hapter
Monitoring Your Vehicle's Fuel System
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