Kegerator setup has too many variables like vertical distance change, hosing resistance, etc. that people on a forum cannot help with.
Add 5-8# of pressure and see what happens. Remove 5-8# of pressure and see what happens. Keep doing fine adjustments until you get her dialed in. Then don't touch anything
And forget about the pour time. It doesn't matter is it takes 60s or 180s -- you just want a good pour.