This is my experience with Kanger tanks/coils ({Pro, Pro 2, Mini pro 2), they are hit or miss. I follow all the "rules" with volts/watts based on the ohm reading I got from vape device. I was still getting a burnt taste so often, so I did what others on this forum suggest
Plan A: (two things you can try)
1. flip the rubber stopper (shaft), so more juice can come in. don't press it all the way down.
2. take some puffer hits (blow into it)
these soaks up the coil more.
Plan B: (works for best me)
1. rebuilt my coils (tons of youtube vids on rebuilding Kanger coils)
the start up cost is there, but once you get everything, tools, silica wick, kanthol wire, lighter, or I prefer my mini blow torch...it's pretty pays for it self. Of course you have to stick correct volt/wattage levels based on your ohm resistance, but I'm no longer get that nasty burnt taste.