What TS said about ps pump noise...
Also, a ps pump can not draw fluid uphill and work properly. Reconfigure your reservoir or pump so there's no kink AND the reservoir outlet is above the pump inlet. "Pump 101".
There's another ps thread going on and guys are talking about how their reservoir mounted on the firewall "works just fine" etc...
![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
just do it the way the guys who make the system tell ya to do it!!!