Fuel gauge issues

Tiny
ARICHARDSON1988
  • MEMBER
  • 2006 FORD F-150
  • 3.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
Had fuel pump issues. Changed my fuel pump, FPM (fuel pump modular), fuel filter, and fuel pressure rail sensor. Truck runs great! My only issue is after resetting my truck by disconnecting the battery then reconnecting it I will go start the truck and have the correct reading on digital and meddle reading of the fuel. After about one to two minutes my needle will dive past E then my digital gauge will read - - - miles to E. I am completely lost on what I’ve done. Any help would be appreciated.
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Wednesday, April 10th, 2019 AT 8:18 PM

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Tiny
SCWICKEDSTANG
  • EXPERT
This sounds to me like you could have a faulty fuel sending unit. The fuel sending unit is usually attached to fuel hanger and is a float the as it moves up and down with the fuel level, it produces electricity that your vehicle's Power-train Control Module (PCM) uses to interpret the amount of fuel in the tank. Sometimes, through normal wear and tear and gunk that collects over time your vehicle's fuel sending unit will fail. When this happens your fuel tank will not read properly, if at all.
In the diagrams down below I have included instructions for the removal and installation of the fuel sending unit. Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Wednesday, April 10th, 2019 AT 9:56 PM

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