Hi
@Startrek and welcome to the planet.
ive not used this kit or tank so a bit more info is needed.
did you buy the drag 3 as a kit which came with a tank? this tank is a direct to lung sub ohm tank for higher wattage.
the coils for that tank are rated at:
TPP-DM1 0.15Ω: 60 - 80W
TPP-DM2 0.2Ω: 40 - 60W
are you now using the innokin pro which im guessing is the zenith pro? if so this is a mouth to lung tank for much lower wattage.
these coils are rated:
1.2Ω (10-14W)
1.0Ω (20-25W)
so have you lowered your wattage on your drag 3
also what setting have you got the drag 3 set too. you need wattage mode also known as power mode. you should never use TC temperature control mode with these coils.
last thing. what ratio of juice are you using ie VG and PG
for sub tanks at higher wattage you are best with 70vg
for mouth to lung tanks at lower wattage you should be using 50vg/50pg as 70vg is too thick and will burn coils out quick.
as said above, priming any coil by dripping a couple of drops on all the cotton around the coil holes first, then install into tank, fill, sit for 5-10 mins then use the lowest wattage for the ohm coil you are using then turn up a watt every few puffs.
more info here
https://www.ecigarettedirect.co.uk/voopoo-drag-3-kit
https://www.innokin.com/zenith-pro