I am using a used HX with vibratory pump (Izzo vivi). I have Ceado e5p grinder. It seems be a nice setup.
Unfortunately I cannot get decent coffee stream, no matter what I try to do.
When grinding fine (maybe too fine), the stream is slow and unsteady resulting in coffee on the edge of over extraction, and thin fast disappearing crema. When grinding less fine, it is too fast, unsteady and under extracted, with lighter color and flat taste.
The grinder is stepless. No matter how I set it, it seems the water does not have enough power to extract the coffee properly. The extraction is never with big oily drops or steady dense stream resulting in strong crema with the right color.
I thought the issue was related to brew pressure. I measured it using a portafilter with gauge. It was a bit less than 9 bar. I changed it to show 10 bar.
I saw in one of the tech tips videos that this should give me the correct 9 bar pressure at the group.
Doing this did not help and the stream is still the same. I don't know what else I can do. I even consulted with a professional tech and he said that if brew pressure shows right, it should work.
I hope someone can help me identify the problem.