i have no idea. Going to look at some videos and see what’s easiest

 

i found a blown fuse in slot number 24. Changed it out and the gauge works!

 

That sure beats taking the gas tank out!

 

heck yeah!

 

wonder what made that blow ?

 

Not sure. I purchased it the last week and I was just trying to get everything running correctly. Got the check engine light and abs light taken care of. And now the fuel gauge. Still looking for a normal sounding truck to compare my truck to. Basically one that’s running with no timing chain issues

 

2008 F-150 FX2 - took the truck in for an unrelated issue but found this part crumbling. At least it didn’t leave me stranded.

 

it's amazing some of the modules i've seen and still work.

 

Whats the symptoms of a bad driver module tho? bc i have this rushing water sound coming from the the rear of my cabin when I accelerate

i feel like im hearing my gas rushing to the engine but idk. Either way I shouldn’t be hearing that right?

 

Symptoms of a Bad Fuel Pump Driver Module
The FPDM on your truck controls the fuel pump’s operation, and when it starts failing, you’ll typically see these signs:
Engine stalling or hesitation: The pump might not deliver consistent fuel pressure, causing the engine to stumble, especially under load (like acceleration).

Hard starting or no-start: If the FPDM fails completely, the fuel pump might not run at all, leaving you cranking without ignition.

Surging or rough idle: Inconsistent power to the pump can make the engine feel unsteady.

Check Engine Light: Codes like P1233 (FPDM disabled or offline) or P1237 (fuel pump secondary circuit fault) might pop up if you scan it.

Fuel pump not priming: Normally, you’d hear a brief hum from the pump (near the fuel tank) when you turn the key to "on." If that’s missing, the FPDM could be toast.

The FPDM on a 2005 F-150 is mounted under the truck, near the spare tire, and it’s prone to corrosion or water damage since it’s exposed to the elements. A failing FPDM usually affects performance more than it creates weird noises, though.
The "Rushing Water Sound" and Your Theory
You’re hearing a sound like rushing water from the rear of the cabin when you accelerate, and you’re wondering if it’s gas rushing to the engine. Let’s think about that:
Fuel movement in the tank: The fuel tank is under the rear of the truck, behind the cabin. If you’ve got a low fuel level (say, under a quarter tank), acceleration could slosh fuel around, especially if the tank baffles are worn or if you’re on an incline. But this usually sounds more like a sloshing or gurgling than "rushing water," and it’s not typically loud enough to hear over engine noise unless something’s amplifying it.

Fuel pump noise: The fuel pump itself is in the tank, and a failing one might whine or hum louder than usual, but "rushing water" isn’t a typical description for that. Plus, the pump runs constantly when the engine’s on, not just during acceleration.

Honestly, fuel moving to the engine shouldn’t be audible in the cabin. The fuel lines are pressurized and quiet, and the system’s designed to keep things silent. So, no, you shouldn’t be hearing that if it’s fuel-related.
Other Possibilities for the Sound
That "rushing water" description leans me toward something else. Here’s what I’d check:
Exhaust issue: A cracked exhaust pipe or a failing muffler/resonator near the rear could create a whooshing or rushing sound that gets louder with acceleration. The 5.4L 3V has a long exhaust system, and a leak could sound odd, especially under load.

HVAC system: If the sound’s more inside the cabin, air or water in the heater core (part of the HVAC behind the dash) can mimic a rushing water noise. But this usually happens at idle or with the heater on, not tied to acceleration.

Differential or driveline: A worn rear differential or U-joint might make a rhythmic noise that ramps up with speed, though it’s usually more mechanical than "water-like."

Loose heat shield: A rattling or vibrating heat shield under the truck could amplify exhaust or road noise into something weirdly fluid-sounding.

Connecting It to the FPDM
A bad FPDM could indirectly tie in if it’s making the fuel pump run erratically, causing pressure surges you’re somehow hearing. But that’s a stretch—most FPDM failures don’t manifest as cabin noise. Your acceleration-triggered sound points more to exhaust, sloshing fuel, or something mechanical than the FPDM alone.
What to Do Next
Check the fuel pump prime: Turn the key to "on" (don’t start it) and listen near the rear (under the bed) for a 2-3 second hum. No hum? Suspect the FPDM or pump.

Inspect the FPDM: Crawl under the truck near the spare tire. Look for corrosion, cracked casing, or water damage on the module. If it’s shot, you’ll see it.

Listen closer: Pinpoint the sound. Is it under the truck, in the tank area, or inside the cabin? Use a buddy to rev it while you listen.

Scan for codes: Grab an OBD-II scanner. Anything fuel-related (P123X codes) could confirm an FPDM issue.

Fuel level test: Fill the tank and see if the noise changes. If it’s sloshing, it might quiet down.

If the truck runs fine (no stalling, surging, etc.), the FPDM’s probably not the culprit for the noise. I’d lean toward an exhaust or tank-related issue based on what you’re describing.