Gas filler puke

PATRIOTKJM

PATRIOTKJM

New member
I spent a decent amount of time looking for reasons I couldn’t fill up without the filler spitting fuel out every 3 seconds. And no this has nothing to do with the recall for a check valve. Changed the ESIM, changed charcoal canister, changed the purge valve, changed the filler line, and then went as far to swap the tank. Problem remained so I went through and individually disconnected every line in the entire evap system while trying to pump gas at each interval. Finally when I got to the second section of the small vent line that runs from the tank to the fill tube I made some progress. So I pulled the line out and blew air thru it and out the other end came a chunk of spider web. Problem solved... if anyone needs a tank or evap parts let me know cause I now have a spare everything [emoji36]


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Sucks that you had to go through all that, but I believe it. When I worked for Ford, there was a TSB introduced for that symptom and it included installing a "spider screen" to prevent them from getting into the EVAP system.
 
That's good to know. I'll have to look into this. I have to pump on the slowest setting or it keeps shutting off and pukes fuel out when it gets full. Thanks for the info!
 
nbunga said:
That's good to know. I'll have to look into this. I have to pump on the slowest setting or it keeps shutting off and pukes fuel out when it gets full. Thanks for the info!
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That’s from the fill tube check valve TSB. Mine would puke fuel out on an empty tank the second I started pumping. If yours only does it when full that’s because of the recall and they will change your fill tube for one that has a plastic check valve in it.


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PATRIOTKJM said:
That’s from the fill tube check valve TSB. Mine would puke fuel out on an empty tank the second I started pumping. If yours only does it when full that’s because of the recall and they will change your fill tube for one that has a plastic check valve in it.


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Awesome thanks. I'll check that out
 
PATRIOTKJM said:
That’s from the fill tube check valve TSB. Mine would puke fuel out on an empty tank the second I started pumping. If yours only does it when full that’s because of the recall and they will change your fill tube for one that has a plastic check valve in it.


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Unless your 2007 JKU came from Canada. If that’s the case they’ll give ya the [emoji867]. Ask me how I know.


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Took mine in when I did the airbag recall. There is a tsb that covers 07. Got mine done and have zero issues since. Damn that was embarrasing when it would do that. GL
 
Yeah FCA doesn’t give a shit about your JK if it was built in the same factory as all other JK’s but then shipped to Canada. Luckily I found out there was a cheaper fix than replacing the entire fuel tank. Cost me $56 and took about 30 minutes to install.


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Here’s the replacement check valve.
Image1529288153.994212.jpg
And the part number is CNNNX321AC. Took me about 20-30 minutes to replace it and it works like a dream. I’ve fueled up well over 15 times (at different stations and pumps) since I replaced it and hasn’t puked up at all.


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I’ve been having the same issues for years! This is great information. I’m going to try the dealer first but if they won’t do it I’ll just do it myself.


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DogHouse said:
Here’s the replacement check valve.
View attachment 303884
And the part number is CNNNX321AC. Took me about 20-30 minutes to replace it and it works like a dream. I’ve fueled up well over 15 times (at different stations and pumps) since I replaced it and hasn’t puked up at all.


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Awesome thanks. I get away with just filling slow now. But may be swapping to this to just be able to fill as normal.


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