How do I Stop a Niagara Smoke Effect from Dissipating?

Thanks for the Reply, but the “Grid3D_Gas_Master_Emitter” just has the system lifetime it does not contain anything specific to particle lifetime, and spawn rate. “Drag” is not part of the Emitter and “Velocity” is found 209 times but I can’t seem to find any that particularly relate to the decay of the smoke particles.

I am using the the default “Grid3D_Gas_Master_Emitter” to create a Smoke Sim. I am not spawning normal particles