Mantaflow fluid simulation problems, need advice

I am trying to create a simulation with a fluid flow source which is very small compared to the domain ( the final result will be about 30 times taller than it is wide). However, I am finding that the flow source either doesnt create fluid, or it comes out in small bursts. Also it passes through the collision effector.

On the image above you can see the very top of the collision effector and the fluid source contained inside it.

The collision effector is double sided and the normals are correct. I tried increasing the resolution (although not dramatically yet) and reducing the step size.

What else can I do to correct these issues I am experiencing?