weird/too sweet liquid flavor after new coil

hey guys,i’ve been using my smok nord 4 for a couple months now,a few days ago i started feeling the burnt taste,even though it was full,so today i went and got a new coil,however after changing it the taste became kind of weird,it’s quite different from what it tasted like back when i had my old coil working,and theres also a very sweet aftertaste.What could be wrong here?