Fuel Tank Question
Cargo Master
Joined: May 2007
Posts: 3,336
Likes: 4
From: Western New York
Of course not. But the fuel capacity rating (per the manual) is when the gauge reads empty to full. The extra reserve is not calculated into the fuel capacity rating. So a 34 gallon rated tank should actually be larger than 34 gallons. Also, that is why I posed the two options: 1) the software is programmed for a 29 gallon tank, or 2) the tank is in fact 29 gallons. It could be either. One way or another, Ford made a mistake. This will be my first warranty issue.
Senior User
Joined: Apr 2016
Posts: 222
Likes: 0
Please report back when you get it checked but I think you will find there is a huge reserve left after reading empty and it is not in addition to the published size of the tank. But I could be mistaken. I already assume that I will be having the fuel level recalibrated to 0 when the tank is actually mty and not just a designers fantasy of how to idiotproof the fuel gauge/usage.
I suspect it doesn't fit though.
Cargo Master
Joined: May 2007
Posts: 3,336
Likes: 4
From: Western New York
Will do. Notice that the fuel was just under 28 gallons, which indicates another 1 gallon reserve. My suspicion is that I have a 34 gallon tank, but when they installed the software they selected the 29 gallon tank option. This should be an easy recalibration (just like they do when you install an aftermarket tank). At least I hope so. Maybe if they installed the wrong tank I can convince them to install the 48 gallon tank instead under warranty I suspect it doesn't fit though.
I suspect it doesn't fit though.
Thread Starter
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Senior User
Joined: Jul 2016
Posts: 324
Likes: 1
From: Minnesota
Will do. Notice that the fuel was just under 28 gallons, which indicates another 1 gallon reserve. My suspicion is that I have a 34 gallon tank, but when they installed the software they selected the 29 gallon tank option. This should be an easy recalibration (just like they do when you install an aftermarket tank). At least I hope so. Maybe if they installed the wrong tank I can convince them to install the 48 gallon tank instead under warranty I suspect it doesn't fit though.
I suspect it doesn't fit though.I agree something's off, but I'm hoping its not the tank. So....I grabbed the creeper and went out in the garage. My first intent was to measure up the tank and see if I could get close enough to figure the capacity via math. However, in looking I found the part number and more importantly a stamp with "34" in it (See pictures). I figure the part number will tell us for sure, but at the very least, the stamp is a good sign. Is there anybody on the forum that could run the part number to see for sure?
Also...I've been thinking this whole time...if the tank is indeed the wrong one.....what if this is one of the production delays? Its just a thought, but the fuel tanks are all new so maybe.
Senior User
Joined: Apr 2016
Posts: 222
Likes: 0
I agree something's off, but I'm hoping its not the tank. So....I grabbed the creeper and went out in the garage. My first intent was to measure up the tank and see if I could get close enough to figure the capacity via math. However, in looking I found the part number and more importantly a stamp with "34" in it (See pictures). I figure the part number will tell us for sure, but at the very least, the stamp is a good sign. Is there anybody on the forum that could run the part number to see for sure?
Junior User
Joined: Aug 2016
Posts: 76
Likes: 1
These trucks must hold alot of fuel in the lines and pump. I ran mine down to 5 miles to empty yesterday then was only able to pump 42 gallons in. I have the 48 gallon since i have long bed. Sure makes for a long stand at the pump when u have to fill her up.
Cargo Master
Joined: May 2007
Posts: 3,336
Likes: 4
From: Western New York
I am telling you guys all the newer vehicles are programed to 0 miles to empty when there is indeed 4-6 gallons left in the tank. It becomes a guessing game after you reach "0". Reprogramming is the answer. It is not a mistake on FoMoCo's part. If you live by the gauge even an idiot will not run out of fuel.
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Senior User
Joined: Jul 2016
Posts: 324
Likes: 1
From: Minnesota
I am telling you guys all the newer vehicles are programed to 0 miles to empty when there is indeed 4-6 gallons left in the tank. It becomes a guessing game after you reach "0". Reprogramming is the answer. It is not a mistake on FoMoCo's part. If you live by the gauge even an idiot will not run out of fuel.
I think you are correct Rob. After you fill up, the current MPG multiplied times 34 distance to empty math seems to always work out.
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Senior User
Joined: Apr 2016
Posts: 306
Likes: 2
From: Maine
I am telling you guys all the newer vehicles are programed to 0 miles to empty when there is indeed 4-6 gallons left in the tank. It becomes a guessing game after you reach "0". Reprogramming is the answer. It is not a mistake on FoMoCo's part. If you live by the gauge even an idiot will not run out of fuel.
Cargo Master
Joined: May 2007
Posts: 3,336
Likes: 4
From: Western New York
That would be the way of the past. With the new generation of engineers there might be an edict that prohibits having accurate fuel gauges.
Senior User
Joined: Apr 2016
Posts: 306
Likes: 2
From: Maine
Here I always assumed they were off because the float bottomed out. If it's trivial to get the gauge corrected, I'd definitely choose to do it. I intentionally let mine run low (ended up at 11 miles remaining) to get an idea of how accurate it was being... I put a bit over 24 gallons in. I'd like to be a little closer to empty before it bitches at me for not feeding it.
Posting Guru
Joined: Oct 2005
Posts: 1,460
Likes: 2
Also...another test might be to crawl under a '16 with the 29 gallon and physically measure the tank if possible....and do the same with the 34....just to see the difference and make sure. Or see how the 29 is stamped.
Logistics Pro
Joined: Dec 2004
Posts: 3,541
Likes: 5
From: Weatherford Texas.
Will do. Notice that the fuel was just under 28 gallons, which indicates another 1 gallon reserve. My suspicion is that I have a 34 gallon tank, but when they installed the software they selected the 29 gallon tank option. This should be an easy recalibration (just like they do when you install an aftermarket tank). At least I hope so. Maybe if they installed the wrong tank I can convince them to install the 48 gallon tank instead under warranty I suspect it doesn't fit though.
I suspect it doesn't fit though.