At what point is the coil done even after rewicking?

[indypilotcfi]

I've have an EVOD and have been rewicking with cotton when needed. I usually do it after every 4-5 tanks if I'm not changing flavors. May be too often but its essentially free to do. Usually, if the taste is bad, it I put a new coil in, rewick the old one, and put it in my pile with the rest.

My question is, how do I know when the actual coil is trash?
If the windings are black, are they still good?
If all of the windings light up when I dry burn, is it still good?
Can a bad coil make a burnt taste even if the wicks are new?

I haven't gotten to the point where redoing the wire yet. I've had to throw a coil or two away because when I pulled cotton out, it accidentally crossed a couple of the windings and I couldn't get them undone.

Thanks!!

 

[Rob0506]

If they glow, I would continue to use them. It's just a matter of getting them clean and having fresh clean wick. They should last a VERY long time with what you are doing.

 

[Completely Average]

A coil is "done" when it no longer fires.

My wife has managed to get 4 months of continuous use out of a coil before. That's using the same coil every single day and nothing else. Only threw it away when it stopped firing.

As long as you keep the wicks either clean or new they last a long, LONG time.

 

[indypilotcfi]

Is it a big deal if the coil wires cross? One was tangled up pretty bad. Still fired up but I thought I heard somewhere that it isn't good if they cross like that.

Probably shouldn't have trashed it because it would be good to rewire in the future.

 

[bacc.vap]

Usually if the wire actually breaks it simply won't work anymore, that's one way to know. It's a good idea to have a multimeter or one of the stand alone ohm meters, then you can check your coils to see if they are straying from the ohm range they're supposed to be, that's another way to tell. Sometimes, over time they just get weak and don't put out the vapor like they used to. It also depends on how dirty they get, sometimes it's just easier to put in a new one than try to clean an old one with alot of wear and gunk buildup. How quickly they build up with crud really depends on the juice mainly. Some liquid vaporizes clean and others leave a lot of residue behind, those are usually sweet liquids and others with a lot of suspended solids.

Could still be good if it's black, but you don't know for sure till you try it and see what things taste like. If it does'nt burn off with a dry burn, either try it out or make another coil. You sorta have to figure out what works for you. It's always good to check it's ohms with a meter, if not close to what it should be, get rid of it.

If the windings glow it's working. Still always good to check it with a meter.

Yes a coil with residue still on it can give a burnt taste even with new wicks, actually a brand new coil can have residue on it from the factory and taste bad.

 

[shawnphase]

It really depends on the juice... Ive had coils that have lasted six or seven weeks using clear juice. Also, high VG seems to help me too.

Sent from my A727 using Tapatalk

 

[Noble Gas]

Maybe stating the obvious, but you know not to dry burn with the cotton in there, right? Cotton will burn easily unless liberally doused with juice. That said, dry burning bare coils will help burn off the gunk, though I would recommend 'pulsing' them so they don't get too hot and melt the silicon o-rings or rubber insulator.