yes I was just going to say what Jack said. I come from a tractor background and use of a restrictor makes the steering effort vary with pump rpm and load, similar to what guys were doing with tractors for a little while, throwing a restrictor in the line to the loader lift cylinder to "slow it down". Also the restrictors wear out over time. Wouldn't think so but they do, at least with tractors.
The restrictor's design is such that the amount of assist increases with RPM which is really not what you want for a performance oriented steering system; you want the amount of assist to back off as vehicle speed increases, hence one reason EPAS is "nice". You can electronically control the amount of assist with EPAS, based on many things--including but not limited to vehicle speed. At high speed your assist doesn't need to be as high, if it is, you end up with twitchy steering and a possible safety issue.
back to topic. Whine is prevalent on my 93 LX too, which runs really quiet otherwise--it's muffled and a 4 cylinder and I like it that way. I have used a vacuum bleeder to pull the air out, yet it's still noisy. I've run the steering wheel back and forth wheels up off the ground, spinning the pulley by hand, it's still noisy. I notice that whenever I turn the wheel with the engine off, the reservoir always overflows or bubbles. Nothing leaks anywhere (well the engine has a tiny oil leak but irrevalent for this discussion), so I feel like it's getting air in it somewhere but where? I certainly can't find any kind of leak anywhere?
