For those that like to test the fuel gauge accuracy...

[Bomlodr]

As the title suggests, if you like to see just how accurate your fuel gauge is or see how much further you can go after the low fuel light comes on, I'd recommend you don't. I returned home from work one evening and the fuel light had illuminated more than 50 miles prior to returning home. I was literally on fumes as a pulled into the driveway but as I live 300ft from a fuel station, I wasn't worried. Next day, the truck started normally and I roll into the fuel station. As I'm pulling around the pumps, the truck dies but I coast to a stop right in front of my pump. I'm thinking "cool...this never happens!". So, I top off the tank, start the truck....it runs for about 3 seconds and dies. I figure there's no fuel in the line so I cycle the key about 5 times to pressurize the line with fuel. Try to start the truck...no dice. It won't start at all. A quick check of the FP relay yields no success......still won't start. Getting to the point.....a $225 tow to the dealership and a new low pressure fuel pump later, I've learned a valuable lesson.....when the fuel light comes on, put fuel in the tank. Turns out the fuel pump is pulling enough current that it needs cooled by the fuel running through it. No fuel = overheated pump motor = dead pump. Thankfully, my dealership covered all this under warranty which, incidentally, ran out about 12,000 miles ago so, it could've been much worse financially.

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[Squatchranger]

As the title suggests, if you like to see just how accurate your fuel gauge is or see how much further you can go after the low fuel light comes on, I'd recommend you don't. I returned home from work one evening and the fuel light had illuminated more than 50 miles prior to returning home. I was literally on fumes as a pulled into the driveway but as I live 300ft from a fuel station, I wasn't worried. Next day, the truck started normally and I roll into the fuel station. As I'm pulling around the pumps, the truck dies but I coast to a stop right in front of my pump. I'm thinking "cool...this never happens!". So, I top off the tank, start the truck....it runs for about 3 seconds and dies. I figure there's no fuel in the line so I cycle the key about 5 times to pressurize the line with fuel. Try to start the truck...no dice. It won't start at all. A quick check of the FP relay yields no success......still won't start. Getting to the point.....a $225 tow to the dealership and a new low pressure fuel pump later, I've learned a valuable lesson.....when the fuel light comes on, put fuel in the tank. Turns out the fuel pump is pulling enough current that it needs cooled by the fuel running through it. No fuel = overheated pump motor = dead pump. Thankfully, my dealership covered all this under warranty which, incidentally, ran out about 12,000 miles ago so, it could've been much worse financially.

Thats a very important lesson to learn, I bet you never make that mistake again lmao. Makes sense they would use the fuel itself to cool the pump, one of the few things on this truck that isnt over engineered lol

 

[Msfitoy]

The lowest I've gone is when the 25 mile remaining goes on...just curious...is there any further warnings after the 25 miles warning?

 

[Jhbryaniv]

Thats a very important lesson to learn, I bet you never make that mistake again lmao. Makes sense they would use the fuel itself to cool the pump, one of the few things on this truck that isnt over engineered lol

I never understood why things have to be so complicated. ?

Sometimes the best solution is the simplest solution.

 

[Squatchranger]

The lowest I've gone is when the 25 mile remaining goes on...just curious...is there any further warnings after the 25 miles warning?

I think it warns you at 10 too but I have never gone below that, I always try to fill up around 20 to 30 range. The only time I got to 10 was heading to the gas station and it hit 10 right when I pulled up to the gas pump.

 

[OrangeStreak]

Best policy is probably to fill up before fuel gauge gets below 1/4.

 

[DukeCanBuildit]

As the title suggests, if you like to see just how accurate your fuel gauge is or see how much further you can go after the low fuel light comes on, I'd recommend you don't. I returned home from work one evening and the fuel light had illuminated more than 50 miles prior to returning home. I was literally on fumes as a pulled into the driveway but as I live 300ft from a fuel station, I wasn't worried. Next day, the truck started normally and I roll into the fuel station. As I'm pulling around the pumps, the truck dies but I coast to a stop right in front of my pump. I'm thinking "cool...this never happens!". So, I top off the tank, start the truck....it runs for about 3 seconds and dies. I figure there's no fuel in the line so I cycle the key about 5 times to pressurize the line with fuel. Try to start the truck...no dice. It won't start at all. A quick check of the FP relay yields no success......still won't start. Getting to the point.....a $225 tow to the dealership and a new low pressure fuel pump later, I've learned a valuable lesson.....when the fuel light comes on, put fuel in the tank. Turns out the fuel pump is pulling enough current that it needs cooled by the fuel running through it. No fuel = overheated pump motor = dead pump. Thankfully, my dealership covered all this under warranty which, incidentally, ran out about 12,000 miles ago so, it could've been much worse financially.

More accurately, every Ford purchaser and employee covered this because of the BS warranty claim filed by your dealership.

 

[WingShot]

I am notorious for running out of gas, and it is certainly better to avoid that for many reasons. However, a week ago I did manage to run out of gas. Not once, but technically twice. I was headed to WY on a fishing trip, the first time I syphoned the gas out of my generator and that got me a few more miles before the tank was empty again.

I guess my point here is, that my fuel pump has been working fine for several hundred miles and over a week since.

 

[Squatchranger]

I am notorious for running out of gas, and it is certainly better to avoid that for many reasons. However, a week ago I did manage to run out of gas. Not once, but technically twice. I was headed to WY on a fishing trip, the first time I syphoned the gas out of my generator and that got me a few more miles before the tank was empty again.

I guess my point here is, that my fuel pump has been working fine for several hundred miles and over a week since.

Based on what op said I think his situation was a lot more extreme than yours, if he fully emptied the lines and kept constantly burning up the pump as he said then it would be a lot worse than just emptying the tank and having potentially some fuel still in the lines.

 

[DukeCanBuildit]

Based on what op said I think his situation was a lot more extreme than yours, if he fully emptied the lines and kept constantly burning up the pump as he said then it would be a lot worse than just emptying the tank and having potentially some fuel still in the lines.

So, I’ve read two explanations on this forum to explain this fuel pump killing event….

1. No fuel in tank to keep the in-tank fuel pump cooled
2. No fuel in lines to keep the fuel pump cooled

Maybe one of the techs in the forum will stumble upon this and give us the definitive cause.

 

[IdahoRanger]

So, I’ve read two explanations on this forum to explain this fuel pump killing event….

1. No fuel in tank to keep the in-tank fuel pump cooled
2. No fuel in lines to keep the fuel pump cooled

Maybe one of the techs in the forum will stumble upon this and give us the definitive cause.

One thing that is definitive: no fuel, no go.

 

[Squatchranger]

So, I’ve read two explanations on this forum to explain this fuel pump killing event….

1. No fuel in tank to keep the in-tank fuel pump cooled
2. No fuel in lines to keep the fuel pump cooled

Maybe one of the techs in the forum will stumble upon this and give us the definitive cause.

Honestly it may be a bit of both, there are multiple fuel pumps right? High and low pressure?

 

[Skit hjälm]

This has been a common thing on in-tank electric fuelpumps forever.

 

[Bomlodr]

More accurately, every Ford purchaser and employee covered this because of the BS warranty claim filed by your dealership.

Ok.
Well.... on behalf of my dealership and I, I'd like to preemptively apologize to anyone purchasing a new Ford for negatively impacting the cost of your new vehicle. I'd also like to extend my heartfelt apologies to all Ford employees for personally eating into your raises, bonuses, and margins. I had no idea my fuel pump would have a global impact. I'll do better next time.

 

[Bomlodr]

This has been a common thing on in-tank electric fuelpumps forever.

Probably.
I've never run any of my FI vehicles this low before so....I'm truly the idiot that learned a lesson the hard way. I usually fill back up at the second light (25miles) but I thought I'd be a smartass and push the test button. Definitely won't do that shit again!

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