Sounds like you isolated the problem. But, I also read what sounded like you were vaping the coil with the tank dry? If that's the case, I'm sorry to say you may need a new coil, as you stated you were tasting "burnt." It's never a good idea to even test fire a drop in coil without filling the tank. You may well. have destroyed that coil.
Sounds like you've fixed the issue, you can certainly TRY filling the tank, and priming it (you let it sit a bit, take draws through the mouthpiece, without firing the mod at all, then keep doing that while slowly increasing the wattage in increments (you may not get visible vapor, that's fine, the purpose of doing priming puffs is to get the cotton in the coil well saturated. Work your way slowly up to a vape that is satisfying to you, and etc.
I am going to guess that the coil you have in there is toast. I may be wrong, but if it's burnt and you try vaping it, you will need to discard your tank of juice (the burnt taste well might liger in the juice and tank if you try to vape it, and you'll have to do a thorough tear down of the tank and wash it again to get rid of the burnt taste.
The good news is, you've isolated the problem so if you just get your coil priming down, you should have working gear, even if you need to use another coil up front.
Best of luck,
Anna