Power Steering Not Returning to Center

[Hoffman5982]

Let me first start by saying this shit is exactly why I've run manual steering for the past year and a half. Since putting power steering back on in September my car hasn't been driven on the road at all due to issue after issue.

I'm on my 3rd pump and now my second rack. The first rack worked for a day of track driving and promptly died. I got this new rack, which was remanufactured and pulled off my friends car working. I put it on mine, fill the system, and it works just fine. It turn nice and smooth with no vibrations or noises. The only issue is it does not return to center. Like at all. It's not my alignment which is what everyone seems to point to when someone asks this question. The newest pump was pulled off a perfectly running car. What the fuck is going on? Could it be the rack even though its assisting just fine? I tried adjusting the preload answer can feel the steering get lighter but it still doesn't return unless I'm doing a u-turn, but even then it never goes back to center. Why is power steering so shitty?

Thanks for any help or suggestions.