So I've tried looking up as much as I can on this and have tried about everything I can think of, but I'm running out of ideas. This all started back when my power steering first started leaking. I had the typical pressure fitting leak at the pump and bought the JTSVP kit to covert it to AN style hoses. This coincided with the first pump failure after my second time taking the car to the track. Got the car home and put on a new pump and never could get power assist on the steering at idle. My dad ended up putting on another pump while I was out of town for me and it seemed nothing was fixed initially. Still little to no assist at idle, but after driving it around for a week or two I finally got back to normal steering. Fast forward to my next track day (I do one a year currently) and during one of my sessions the power steering pump fails somewhat spectacularly. Looks like the front seal let go, so I swap in yet another pump (now on to number 3) in the parking lot and it seems to work okay initially. I have assist from the beginning, but it's noisy as it's still working out air in the system. Come back the next morning to bleed it some more before going on the track and I no longer have steering assist at idle again. I'm thinking I must have just toasted the pump with the aerated fluid, so when I get back home I do a full power steering system teardown and suck as much fluid out of the lines as I can with a hand vacuum pump on the return lines. Put in pump number 4 and fill the system up with ATF+4 and take my time getting all the bubbles out. Obviously the system has to run to do this, so I'm aerating the fluid again to some degree, but only at idle. However, I still have no assist at idle. I have to wind the engine up to 1500-2000 rpm before it feels like it used to. I have cranked the wheel back and forth with the wheels up and the engine off something like 100 times now and have a hard time believing it's just air in the system at this point. I have also run the cooling fan at max speed to bleed that part of the system. I'm now just at a loss. I am getting tired of putting pumps in this thing, but I'm not sure what else to try. It doesn't seem like it would be the fan or rack as the system worked fine previously before the pump shot the front seal at the track. The other thing I have noticed is that the pump doesn't sound like it's hitting relief at the steering stops. If I crank the wheel hard and hold it, it barely gets any louder than normal. It doesn't give the typically hydraulic bypass sound you hear in most other cars. Any ideas what to try next? They have all been rebuilt pumps, but I have a hard time believing that I would have so many crappy pumps in a row and that a new one is really necessary. What else would wear in these besides seals that would make a rebuild inferior? I have ordered a steering analyzer gauge to try to verify the pump output and check the fan module and rack, but am looking for ideas while I wait for it to show up.