Power Steering - Won't Countersteer and lots of Resistance

[karl wasabi]

OK, so I have a problem. I have an RB20 swap done to my car and I've noticed that my power steering is inconsistent. When I turn the wheel left or right really hard, I feel a lot of resistance in the steering as if the power steering went away. Also, when I make a turn and let the wheel go, the car will continue to turn in the direction it was going instead of countersteering back to straight. When drifting at the track, initiation is very hard due to the power steering giving me a lot of resistance. Also, I have to force the wheel to countersteer instead of just letting it go and do it's thing.

-Coilovers are NOT binding
-Caster is set to 7 deg.
-Alignment is straight as an arrow
-PS has been bled many times
-Belt is tight

I have also have a high pressure stainless line and a pretty decent sized oil cooler. Do you guys think the size of the cooler can affect the steering in this way?

I searched and only found one thread similar to the problem that I am having, but the guy had a KA and he couldn't figure out the problem either. He ended up removing the pressure biasing valve on the pump itself. I do not want to do that, nor do I know how to do that. haha.

Any help or advice will be much appreciated. Thank You!