Despite being in the incorrect section, I guess I can shed some light on the topic, it'll be moved by a mod to the correct section in no time.
Right, so a flame particle textures does not create a flame.
The flame particle texture only contributes is only a cosmetic item, so it only changes the shape and sometimes even the color of the flame(s).
However, not all flames are effected by flame particles, otherwise known as FPT -short for Flame Particle Texture.