Replaced a leaking power steering pump in my 99 Nissan Maxima about a month and a half ago. Bought the new pump from NAPA, used NAPA branded power steering fluid. My buddy and I switched out the pump, replaced all the fluid in the system, kept the car on jacks and moved the wheels from stop to stop for probably 10 minutes until all the air bubbles appeared to be purged from the system.
The pump works once there are some RPMs on the engine; even as low as 1000-1200. Sitting at idle, however, there is no power steering. Any common causes for this? The car is a manual, not sure that makes a difference.
I felt the belt deflection again this morning and it seems tight; no squealing from the engine or anything. Belt deflects between 1/4 to 1/2 inch per the Haynes manual.
Reservoir appears to be full; it's sitting right between cold min and cold max when the car is parked on the driveway, wheels straight. Same amount of fluid as was present after the pump was replaced.
Replacing the radiator tomorrow and I will try tightening the belt tensioner again, but I don't want to overdo things.
Would love to fix the issue without swapping out the pump because that repair was a bear. Suggestions appreciated!
Edit: Screenshots of the power steering pump used to replace the original (link to NAPA listing)