their has been MANY complaints about that for this
mod not sure if their is a fix or how to fix i know many people returned theirs because of it. i think their is a fix online kind of ridiculously long it seemed but pretty simple. i found it on youtube think he just reseted the coil ohm rating before putting in a new one something like that.
i probably should really test mine out but only have ti
coils for one
tank and that coil is still good to run, just lazy to switch it out.