I don't have electric steering but do want a cup car power steering pump set up in the future. I am tired of seeing P/S fluid sitting on the top of my engine.....not sure If I have a vent line issue.
Assuming all is well with the pump itself....which maybe your problem. I would look at the placement of the reservoir with respect to the pump intake.
Do you have a section of line routing that impedes proper pump suction head......a bend or a loop in the wrong spot which is preventing fluid getting to the pump under G.
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