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Unread 09-02-2013, 09:20 PM   #1
JordanTheJew
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Fuel Overflow on 2012 JKUR

I know that there is a similar topic a ways down, but on a slightly older model with, from what I understand, had a recall. Now, I have a 2012 JKUR and it seems as if every time I fill up, if I try to add a little more gas after the pump stops, it overflows and gets everywhere. My dad has told me many times in the past that "there is alway more room" and to "always add a little more." On every other vehicle my family has owned and on his '87 YJ, we are able to top it off a bit. Is it common and normal that I can't do this on my JK? And is there something I can do to fix this so if I do try to get a little more in after it stops, it doesn't overflow and pour out?

Thanks everyone!

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Unread 09-02-2013, 10:43 PM   #2
ronjenx
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Overflowing when you try to add more isn't the same condition as those that overflow at the first automatic shutoff.


This is from the 2012 Owner's Manual:

To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
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Unread 09-03-2013, 12:10 AM   #3
AlbertaJeeper
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I think it even says to not top it up on the cap now! The one time my dad tried it overflowed. I never topped it up anyways so no problem at all
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Unread 09-03-2013, 03:08 AM   #4
AveCat
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Its also illegal...
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Unread 09-03-2013, 07:54 AM   #5
spyder6
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There isn't room for more on modern vehicles. You're dealing with a pressurized fuel system.
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Unread 09-03-2013, 08:47 AM   #6
awinski
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Do that again you may also kiss your evap canister good bye. Dont do this on new vehicles
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Unread 09-03-2013, 10:10 AM   #7
pismo61
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No need to top off on newer vehicles.However my 96 xj you could add over 2 gallons by topping off.
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Unread 09-03-2013, 10:31 AM   #8
JoeCitizen
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I've done it many times on my 2012 JKU. Nothing blew up and surprisingly no one arrested me. Having said that, I'm getting to where I don't bother because I can only get 2 maybe 3 tenths of a gallon more in there. I figure that's only about an extra block.
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Unread 09-03-2013, 11:23 AM   #9
Jiblet
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Quote:
Originally Posted by JordanTheJew
I know that there is a similar topic a ways down, but on a slightly older model with, from what I understand, had a recall. Now, I have a 2012 JKUR and it seems as if every time I fill up, if I try to add a little more gas after the pump stops, it overflows and gets everywhere. My dad has told me many times in the past that "there is alway more room" and to "always add a little more." On every other vehicle my family has owned and on his '87 YJ, we are able to top it off a bit. Is it common and normal that I can't do this on my JK? And is there something I can do to fix this so if I do try to get a little more in after it stops, it doesn't overflow and pour out?

Thanks everyone!
Some pre-2010 JKs had problems with fuel filler vent and fuel inlet check valve causing overflow but that is different from trying to top off the tank.
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Unread 09-03-2013, 06:06 PM   #10
thebgkoolio
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modern fuel systems are designed to have a shut off. if you add more fuel after the auto shut off either you will flood/fill the evap canister (usually not ganna be covered under warranty) or the pump will recirculate the fuel or spill out of your filler. I would advice just leave it after the auto shut off.
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Unread 09-10-2013, 03:30 PM   #11
11JKGIRL
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I had the overflow problem in my 07 JKU. I just slowed the pump way down when I knew it was getting close to full and the pump would cut off without overflow. My 11 JKU doesnt have the issue. You can't top off these tanks. When the pump cuts off it's completely full.
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Unread 09-10-2013, 04:26 PM   #12
Lenny7
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Must... Get... .00000001 of a gallon... More!
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Unread 09-11-2013, 06:34 AM   #13
11JKGIRL
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Good to the last drop!!
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Unread 09-11-2013, 06:44 AM   #14
horaceunit
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My new 2013 JK is the same way. I can get maybe .20-.75 cents more in (not really a top off) after the first auto shut off. I too was used to "topping" off as a matter of course. First time it happened and I over flowed it I went and checked the manual and it does say not to top off. OK now I just try to get to the nearest whole number when I fill up. So if it hits $38.33 at the first shut off I try to get it to $38.50. I hate having to enter odd numbers into the check book. Upsets my sense of balance in the universe.
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