Have you set wire type to Titanium?
Have you set resistance when tank/coil is at room temperature?
Are you sure connections are tight?
Did you build a SPACED coil like this one from @Pro_Vapes ?
This was my build. Notice I did a 3mm ID.
I personally did not open the juice ports wider (Drill them larger). Possibly the wider ID makes it unnecessary or possibly because I can not Lung Hit I don't need extra juice flow......
If you have covered all these bases then it must be your is wicking too tight. Dry Hit, Not Enough Juice for the amount of power applied.....