You mean how to bleed the system? Not sure why you want to flush the PS. To bleed (which you need to do anytime the power steering fluid lines have been disconnected):
With the front wheels straight, fill the power steering to the cold mark.
Start the engine and run at a fast idle, then recheck the level and add more if necessary, to reach the cold level.
Bleed the system by turning the wheels from side-to-side, without hitting the stops. This will work the air out of the system. Keep the reservoir full of fluid while this is being done.
When the air is worked out of the system, return the wheels to straight ahead, and leave the engine running for several more min.
Then road test...to the auto parts store and buy a Haynes repair manual. Best $16.00 bucks you can spend.
i need to flush my PS fluid because it is black and smells burnt so i dont feel right driving it around. Can anyone tell me how i would get all the black fluid out and replace it with clean stuff?
the normal way is to take off the return line to the pump and run the motor with someone turning the wheels, letting the fluid drain into a pan while pouring in new stuff. you stop when new fluid starts coming out the hose. what kind of fluid do you plan on using? personally i would recommend Mobil 1 ATF. ive had friends do it on their 4.6's and it really helps out the steering.
could you tell me where the return line is located at and how much of the mobil 1 i would need, and whats the diffrence between that and power steering fluid
well, ford does NOT use powersteering fluid. they use atf. at the dealer we had a power flusher that did it for us so i never had to use that method on a 4.6. i would get about 3 quarts of the fluid just to be safe.