Normal, it's spit back or spitting. What watts are you running and which coil are you using the .3 or .5, assuming you just got it. Do you use high VG liquids, as the tank can flood with higher PG anf it can flood using low watts. If you are using the .5 your mod is fine but for the .3 you are on the bottom end for powering the coil. Generally though it's probably minor flooding and should clear up, turn tank upside down and take apart, see if there is any liquid in the base. If there is liquid in base, that's flooding.