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Thread: Strong gas fumes when tank is full

  1. #1
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    Strong gas fumes when tank is full

    My ‘16 JKU stinks up my garage with strong gas fumes when my tank is filled. No puddles of gas on the floor or sign of leaks. Any idea what would cause this ? The fumes subside after the tank is three quarters full or less. Thanks !


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  2. #2
    Meme King WJCO's Avatar
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    Light a match and the leak will be quite obvious.

    (Just kidding to be politically correct in today's internet world so I don't get sued. )

    Check your charcoal canister and purge valve.
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  3. #3
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    Quote Originally Posted by 2jeeps4me View Post
    My ‘16 JKU stinks up my garage with strong gas fumes when my tank is filled. No puddles of gas on the floor or sign of leaks. Any idea what would cause this ? The fumes subside after the tank is three quarters full or less. Thanks !


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    When you fill up, do you let it stop on its own and call it good, or do you day F it and top it off to max? i have buddies whoe shake their trucks trying to get all the air bubbles out when filling up haha not my idea

  4. #4
    Caught the Bug Eloucha's Avatar
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    Quote Originally Posted by 2jeeps4me View Post
    My ‘16 JKU stinks up my garage with strong gas fumes when my tank is filled. No puddles of gas on the floor or sign of leaks. Any idea what would cause this ? The fumes subside after the tank is three quarters full or less. Thanks !


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    Same here if u figure it out. Plz let me know. Only when I fill it up.


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  5. #5
    Been Around the Block Gobicon2017's Avatar
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    I believe there is a thread on this somewhere. I remember some we’re having issues with the filler hose. Hope that helps.


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    Gobicon 2017 JKU Recon build

    https://wayalife.com/showthread.php?t=51738

  6. #6
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    Thanks, I ‘ll look it up !


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  7. #7
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    Fuel smell when tank is full

    Had the same problem on a 2007 jk Sahara we purchased recently, after ruling out all evap lines for leaks with a smoke machine, I dropped the fuel tank and found that the smell was coming from cracks in the fuel pump mounting flange. Replaced with new fuel pump assembly and problem solved.
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  8. #8
    Nothing but a Thing zimm's Avatar
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    Still under warranty? I'd have the dealer find it. They have the magic smoke machine for the evap system. I wouldn't mess around with fuel fumes.
    2015 JKU Rubicon

  9. #9
    Fresh Catch GeoWillys's Avatar
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    I have a 15 jk Willys and had that problem. Since I have an extended warranty I took it to the dealership and they found there was an issue where the filler neck connects to tank. Don't remember what was exactly wrong but they ordered a part and installed it. No more gas fumes.

  10. #10
    Addict Brute's Avatar
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    I had a leak at where the wire for the sending unit enters the tank...also check the evap lines

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