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When I changed the pump, I had an option to get it with and without the EVO included; I had decided to buy one with a pulley, and that came with the EVO included.
I didn't use vacuum to purge the system; if you mean bleeding it, I never found anything to explain a procedure other than just turning the wheel from post to post like I've always done in my vehicles.
When I changed the pump, I had an option to get it with and without the EVO included; I had decided to buy one with a pulley, and that came with the EVO included.
Did your vehicle harness have a connector to plug into the pump's EVO?
If your original PS pump didn't have an EVO, look at your steering gear box. If it has an EVO connector you prolly should get a box with it on. If your box doesn't have an EVO connector more than likely your truck didn't have variable assist PS.
Since I had to get my manifolds replaced, and don't really have the proper tools for something like that (cutting wheel, torch, etc), I decided to have a shop do the PS gear as well. This was a guy I've never had do work for me before, and to say that I'm not impressed is an understatement.
When he replaced the gear, he filled it with power steering fluid instead of ATF. When I called him after noticing this, he didn't sound very inclined to flush it out. (He said the stuff he used is supposed to be good for anything.) So now I have a choice to make.
Should I just leave the PS fluid in, or should I flush it myself? If I do decide to flush it, what's the easiest way to do so? Just unhook one of the cooler lines? If it matters, the steering is much stiffer now than it used to be, but I don't know if this is due to it being a new box or what.