Spitting and gurgling means that your wicking is pulling in more juice than your coil can easily vaporize. Superheated bubbles of vapor will form, and then burst throwing juice out like hot little missiles.
Use thicker juice (more VG, which being thicker will ...... the capillary action of your wicking), more power, more airflow, and increase the amount of wicking if you are using the RBA. You can also hit the fire button before you put it to your lips getting the snap crackle and pop out of the way before the mod reaches your mouth.