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mattrhdr

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It just seemed ridiculous (to me) to rebuild when they were only a couple weeks old. Will see shortly.

How often do you normally change your coils? A couple weeks is not a short period of time for a coil... I vape about 3ml a day and i change my coils once a week
 

Bronze

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It just seemed ridiculous (to me) to rebuild when they were only a couple weeks old. Will see shortly.

With a problem like yours, you'll get all kinds of advice to look at this and look at that. By the time you go through all the "this's" and "that's" you would have been able to completely clean and rebuild your KFs a half dozen times over. Some things just don't have answers that we can find. Start over as if you're taking it out of the box for the first time. If it messes up again, then we need to dissect it further. It certainly sounds like your wick is getting pinched off. Why exactly, I'm not sure yet. Maybe the section of your yarn ball has thicker strands in it or something. Could be anything.
 

Ben C.

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How often do you normally change your coils? A couple weeks is not a short period of time for a coil... I vape about 3ml a day and i change my coils once a week
I change my wicks once a week or more depending on the atty... but good microcoils... I've never changed one out of need. Shoot... folks are getting months out of them.
 

76bridget

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See, Bridget, us simply viewing your coils, healed them... ;)

Lol! I should just post the pics from the start next time I have issues. :laugh:

Really tho, I should just keep trying until I figure it out. I get frustrated, and think someone, surely, has had the same problems. Not always I guess!
 

vapdivrr

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Well, whatever I did, it worked. No dry hits on either one for the last 2 hours. Thanks again for everyone's help.

these devices are awesome but do at times seem temperamental. I have done so many builds and still there are times where I say to myself WTH why? at least I have gotten to the point where I can tell from the very first pull if somethings just not right, I immediately pull out the coil and re-do it.
 

TruSound

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These beauties will arrive tomorrow, both are titanium Kayfun top caps...on the left with an integrated drip tip, use your own DT on the right.
5 styles available here...For Sale: Kayfun Tanks and Top Caps

These are made by cmacclel@comcast.net Be patient if you email with questions or order information, he's very busy...his pieces are top notch and well worth the wait.
37 dollars a piece delivered
I'll post additional pics when assembled.
image-19.jpg
 

Dominick0311

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These beauties will arrive tomorrow, both are titanium Kayfun top caps...on the left with an integrated drip tip, use your own DT on the right.
5 styles available here...For Sale: Kayfun Tanks and Top Caps

These are made by cmacclel@comcast.net Be patient if you email with questions or order information, he's very busy...his pieces are top notch and well worth the wait.
37 dollars a piece delivered
I'll post additional pics when assembled.
image-19.jpg

Ahh Truman, I can't wait till I get some extra cash... And I can't wait for a stateside vendor to get kfl+ in stock.
Love cmacs caps


"Aren't you tired of getting dirt dicked in your face" Nacho Libre
 

schizm722

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Hey all :)

I've been using the same coil/wick style for months in both my KFL+'s, and have never had a single issue.
With the help of everyone here, it's great to know that I have atty's that I KNOW will never end up in my atty graveyard,
no matter what the industry brings in the future...

So, I searched the thread again, and couldn't find my answer. (yeah it's probably in here somewhere, lol)

Both of my KFL+'s developed the exact same issue at the same time, and it's never happened before.
Juice from the chamber wicking is migrating out of the channels back into the tanks.
It's has no bearing on performance, just making me scratch my head.

I do, in fact, take the cotton wicking past it's "happy point" on some of my tobacco blends, I always have.
For some strange reason, I like the taste of some tobacco juices when the wick is needing replacement.
I will continue to vape on the old wick until I get a burnt taste, which is usually about 2-4 more ml's.
You can call me crazy, but that's another story.

I mention this because, as you can imagine, the juice in the chamber is darker and easily seen
when it migrates back into the tank.

If I've always been doing this, and never had juice escaping back into the tank, why would both
the atty's display this issue at the same exact time?

All I can think of is that the chimney o-rings in the top cap have both failed at the exact same time?

Any advice would be appreciated!

Have a good day everyone...

~schizm
 

TheKiwi

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I would check to make sure that both parts of the chimney are screw on tight. If that makes no difference, then it's probably that small o ring that sits in the groove inside the top cap; not having a proper deal will cause the internal pressure between the tank and the chambers to equalize. Although.... Theoretically that should lead to flooding and leaks instead of a "backwash"

I do wonder. Have you recently started filling it up really full as compared to before? If so, that would cause a higher than normal negative pressure within the tank itself, which would mean that you'll generally notice the "backwash" happening as you approach lower juice levels, but have normal operation when the tank is still relatively full

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Dusty_D

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Theoretically that should lead to flooding and leaks instead of a "backwash"

That's what I was thinking..

Trying to rack my brain because I know that backwash was discussed here previously, but cannot remember what the fix was..

Too little wick with thin juice?!
 

vapdivrr

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i may be wrong but i think this is normal. i see juice being sucked into the chamber as one draws from the device. this liquid is absorbed by the wicks, the extra juice, or the juice that doesn't get vaporized settles back or slightly seeps back into the tank. i don't see this as something that shouldn't happen. i guess the reason your juice is darkening more is because of the gunky coils. i would venture to say that if you changed out the wicks weekly you wouldn't notice it as much. also if the wattage is quite low the juice may not be getting vaporized completely, this would also add to a darker juice. if your coils were installed about the same time in both devices it is also possible that they are degrading slightly, as they degrade they may not be glowing as much as they once did, there again vaporization is going to be less. i know one would think the pressure would keep old juice from going back into the tank but over time some has to seep down and if that juice is un vaporized liquid from gunky coils it will turn dark.
 

TheKiwi

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That's what I was thinking..

Trying to rack my brain because I know that backwash was discussed here previously, but cannot remember what the fix was..

Too little wick with thin juice?!

Tbh I've experienced this just once, and it was when I filled it up reaaaally full. What happens is that as the juice level goes down significantly, the same initial smaller volume of gas gets "stretched" more, leading to a higher negative pressure in the tank. This makes it wanna suck the juice out of the chamber.

If this is right, then at the moment when the backwash is occurring, you should either experience a slightly tighter draw, or hear a louder "air whistling" through the AFC to compensate for the higher tank internal negative pressure. Hmm. But of course that's just me.

Personally I'm lazy about changing my wicks, and it gets gunked up pretty bad but I never see any backwash. Bubbles, yes but not backwash. Anyways that's as much as I can venture to guess as someone who has experienced it once. Good luck! I'm sure a bunch of experienced folks will chime in

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Mitey F

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i may be wrong but i think this is normal. i see juice being sucked into the chamber as one draws from the device. this liquid is absorbed by the wicks, the extra juice, or the juice that doesn't get vaporized settles back or slightly seeps back into the tank.

This makes sense to me... negative pressure in the chimney will be transferred to the tank, and the juice (being in the juice channels) must be sucked back into the tank before air can be sucked in, creating your oh-so-precious bubbles.
 
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