Hey. I have a new problem when I vape it tastes like burn out coil but looks like a new.
It appears that you have gone from one end of the spectrum (flooded coil) to the other end (dry coil). Did you
prime the coil with e-liquid prior to installing it in the tank?
This video is for a different tank/coil, but the principles remain the same for all tanks. You won't be able to "break in" the coil as shown in the video because your battery device has only one power setting, but it does show how to "prime" the coil. That's the major downside of a setup like yours: It's basically a mechanical mod with some rudimentary safety circuitry.
One of the complaints for this and other "fixed" output sub-ohm setups is the vape may be too harsh or warm for certain individuals. Often when a vape is unsatisfactory, a change in the wattage setting can correct the vape; but you can't do that with these types of devices.