Power Steering Pump?
- Thread starter HOTLNC
- Start date
They can leak internally which can be a common hard steering effort complaint.
The electronic variable orifice (EVO) power steering control valve actuator which is connected to the pump body to provide variable power assist. Basically responsible for low steering effort at low speeds and higher steering effort at high speeds. There is an EVO module which is fed information from the VSS(Vehicle Speed Sensor) which controls a variable orifice in the pressure side of the pump. This usually fails 'open' which means less steering effort at high speeds.
Maybe hers is bad..which would make her wheel much easier to turn that his wheel.. if that makes sense.
Only other thing I could think of would be a "binding ball joint", but that would usually be associated with a squeal or squeak as well.
Yes, I guess it does. The disparity between the two does not necessarily mean the 'harder to steer' one is the one at fault.
Does anyone definitively notice the variable steering in their Mark VIII?
I don't. But I do know my '93 steers 'harder' at idle in a parking lot than my '96. I don't think it's necessarily a problem though.
My red 94 is always stuck on "highway mode". The assist is always minimum. I like it that way. I didn't know there was a "problem" with it until I bought my green 94. I did have a bad rack a few years ago but when I replaced it, it made no difference.
The green 94 steering assist varies with speed as it's supposed to.
Both cars steer the same on the expressway. At lower speeds and parking manuvers, the green Mark has more assist. I don't care for it. It's like driving a Crown Vic compared to my red Mark.
One of these days, I'm going to try to disable the variable assist on my green Mark too. I think that the valve that controls it, is located in the power steering pump.
The green 94 steering assist varies with speed as it's supposed to.
Both cars steer the same on the expressway. At lower speeds and parking manuvers, the green Mark has more assist. I don't care for it. It's like driving a Crown Vic compared to my red Mark.
One of these days, I'm going to try to disable the variable assist on my green Mark too. I think that the valve that controls it, is located in the power steering pump.
It's on the bottom of the pump and it has two wires going to it..
Shouldn't be hard to defeat...
In the SCT proracer software you can just click in a little box and disable it, by telling the pcm the sensor doesnt exist.
So, how does one tell if the pump or the Rack? I drove it today and it feels normal to me. Maybe I'll leave it until something blows or I have to use my feet to help steer it.
Right now I've sprayed the bottom of the motor, looking for a source of an oil leak. I figure with 270K on it, the oil filter adapter seal is going out. But I haven't confirmed that yet.
Right now I've sprayed the bottom of the motor, looking for a source of an oil leak. I figure with 270K on it, the oil filter adapter seal is going out. But I haven't confirmed that yet.
