Gladiator fuel overflowing.

[TinMan2020]

Fuel in the fill tube, aerated fuel - meaning bubbling gas, or gas splashing against that hole near the end of the nozzle (the small hole on the side near the end) will cause a shutoff.
If the fuel is flowing fast, the flow will actually force gas down the long fill tube which goes down, across, and then over to the gas tank. There's some air in the tank at the top, sort of like a home on a well system, you have a pressure tank, air at the top gets compressed forcing water out the pipe when you open a valve.
The force of the incoming gas will slightly pressurize the air in the top of the gas tank. The force of FAST FLOWING GAS will keep the gas down in the fill tube against that pressure. When the nozzle shuts off suddenly after a fast flow, the gas in the fill tube "rebounds" and splashes out.
I fill fast to the point, then put the nozzle on slow, or manually hold the valve to fill the rest of the tank more slowly, preventing that pressure build-up and keeping the nozzle outflow from forcing gas down the tube toward the tank.



It's a commercial link - selling product, but it's a darned good explanation of the nozzle operation.

This is a good explanation, however, it shouldn’t be an issue. The engineers should have designed this flaw out of the equation. They’ve likely had at least three years of complaints to address the issue.
I say three years because they very well could have addressed it in the 2024 and 2025 model years for all I know.

Before someone says “it’s a pump problem” I’ve never see any cars around me at the fuel pumps have gas splash out all over the side of their vehicles while I’m taking a petro bath.

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[ShadowsPapa]

This is a good explanation, however it shouldn’t be an issue. The engineers should have designed this flaw out of the equation. They’ve likely had at least three years of complaints to address the issue.
I say three years because they very well could have addressed in the 2024 and 2025 model years for all I know.

Before someone says “it’s a pump problem” I’ve never see any cars around me at the fuel pumps have gas splash out all over the side of their vehicles while I’m taking a petro bath.

I've only ever had an issue a couple of times in the past with my JTs - the 2020 has no issues, the 2022 did it but only at certain pumps and stations, 99% of the time it didn't do that.
The 2024 so far hasn't done it.
My two cars - I have to pay really close attention and when the gas starts making a certain sound, I SLOWLY release the nozzle - really slow, a quick release guarantees me a bath.
My prior trucks - the Silverado and the F250 - never a problem, ever, but the fill tubes were large diameter, which helps.

Some have the issue, some never ever do, and some have it "on occasion". I've not really had it enough to complain or worry about it as I found it really was "the station's pumps" in my particular cases when it happened.
Slow shut-off is the key with these in some cases.

 

[TinMan2020]

I've only ever had an issue a couple of times in the past with my JTs - the 2020 has no issues, the 2022 did it but only at certain pumps and stations, 99% of the time it didn't do that.
The 2024 so far hasn't done it.
My two cars - I have to pay really close attention and when the gas starts making a certain sound, I SLOWLY release the nozzle - really slow, a quick release guarantees me a bath.
My prior trucks - the Silverado and the F250 - never a problem, ever, but the fill tubes were large diameter, which helps.

Some have the issue, some never ever do, and some have it "on occasion". I've not really had it enough to complain or worry about it as I found it really was "the station's pumps" in my particular cases when it happened.
Slow shut-off is the key with these in some cases.

I’ve owned over 25 cars in my life. I’ve never…..never…..never had a problem with fuel splash at the pump ever before. I find it hard to believe that you have two other brand/model cars that splash fuel like the Gladiator potentially will, with respect.

 

[ShadowsPapa]

I’ve owned over 25 cars in my life. I’ve never…..never…..never had a problem with fuel splash at the pump ever before. I find it hard to believe that you have two other brand/model cars that splash fuel like the Gladiator potentially will, with respect.

I don't worry about those - not a big deal and they don't get to a station very often. They are decades old.

 

[#jeepstyle]

I’ve owned over 25 cars in my life. I’ve never…..never…..never had a problem with fuel splash at the pump ever before. I find it hard to believe that you have two other brand/model cars that splash fuel like the Gladiator potentially will, with respect.

Tinman2020,
I completely agree with you. I have owned 3 Chevolets, 2 Fords, 1 Izuzu, 1 BMW, 1 Honda, 1 Toyota, and now 2 Jeeps. In addition, I have driven countless random rental cars and moving trucks. I have NEVER EVER had a vehicle spit gas until my new Gladiator. Jeep has had years of feedback to have engineers fix this issue ! And it is dangerous to take those petro baths !

 

[ShadowsPapa]

I have NEVER EVER had a vehicle spit gas until my new Gladiator. Jeep has had years of feedback to have engineers fix this issue ! And it is dangerous to take those petro baths !

I have, however, this is 2025, not the 1980s or 1990s.
They've had an issue for a while........ yes, there's something inherent in the design that causes this for some (not all or even most, but too many)
It's dangerous, wasteful, and hard on the vehicle as well.

They should be able to duplicate it with a simple mockup in some small room somewhere.
I believe the issue is exacerbated by the fact it's a very long tube going horizontal tube that I believe goes across and into the bottom of the tank............

 

[Zachattack50]

Finally searching this because its a pita, our 22 will routinely not shut the pump off, or shutoff and still run gas all over the fender flare. I did get a recall for our 07 jk that included a new filler tube with a check valve. That took care of the overflow issue with that one, I should look into retro fitting that in the 22. I will update if I can sort that out.

 

[dcs1779]

Finally searching this because its a pita, our 22 will routinely not shut the pump off, or shutoff and still run gas all over the fender flare. I did get a recall for our 07 jk that included a new filler tube with a check valve. That took care of the overflow issue with that one, I should look into retro fitting that in the 22. I will update if I can sort that out.

I had an 07 JK and had that recall also, I believe that one was specifically because of roll-over. They installed a filler neck with a check valve to prevent spilling in roll-over. I did not experience the fill up spitting with my 07.

WAY BACK, we did have a "Cadillac that Zigs" (Cadillac Catera, I know poor decision...) that would cut off the pump repeatedly on the lowest setting and usually would spit gas when you finally got full. After a couple months of it we had a shop look at it and it had a plugged vent tube from the tank.

 

[Zachattack50]

I had an 07 JK and had that recall also, I believe that one was specifically because of roll-over. They installed a filler neck with a check valve to prevent spilling in roll-over. I did not experience the fill up spitting with my 07.

WAY BACK, we did have a "Cadillac that Zigs" (Cadillac Catera, I know poor decision...) that would cut off the pump repeatedly on the lowest setting and usually would spit gas when you finally got full. After a couple months of it we had a shop look at it and it had a plugged vent tube from the tank.

Our 22 has done it from day one. The 07 was also overflowing from when we purchased it in 2023 and my local dealer mentioned there had been a recall. 5 min fix was nice.

 

[Sweetums]

I had a pretty significant diesel spill this last week. I was filling up at a station and the fuel started coming out - not the "burp" of fuel we get with the old Wrangler either. Never had the problem before and judging by the leftover kitty litter on the ground, it wasn't he first time that pump had failed to shut off.
Fortunately I was standing right next to it and clicked it off manually pretty quick, but it sure made a hell of a mess. The attendant at the station wasn't upset or particularly surprised, they just walked out with another half-used bag of spill control kitty litter and started pouring it on the ground.

I was more pissed about the loss of a gallon of $6/gallon diesel.

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