Please invest on a multimeter.. Never fire anything without checking for shorts..
I concur--it never ceases to amaze me how many people start building coils and fire them without testing them first (not trying to single you out on this spazzixi, it's just a general observation). Make this the next thing you direct vape budget towards. Multimeters aren't expensive. Even though it obviously is, don't think of it as an optional part of your rebuilding kit.
Moving on...
Looking at the picture, I'm inclined to say that your coils are too tight--it looks to me like the wicks are being choked. I'd go with dub151's suggestion about using something to fill out the ekowool as you wrap your coil around it--I do the same thing and find that it helps out a
lot.
Honestly, with 3mm ekowool, I think you'd be fine without doubling it over. The needle/drill bit trick will be easier to pull off with just one strand too. I use a single strand of the 2mm in my drippers and haven't had any issues with wicking.
Hope this helps, keep us posted. And
get that multimeter
Good luck!