Question about 2003 Ford Expedition

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2003 expedition replaced p/s pump and steering rack. it is still hard to initiate a turn in either direction regardless of speed

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  • Master
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First, make sure the PS fluid is not RED.
I hate when mechanics use transmission fluid instead of PS fluid.

Second, make sure you have enough PS fluid in the PS reservoir.
If it's low, then air gets injected into your system, so keep it filled.

Third, exercise your steering (full left & full right) while idling to remove air foam (bubbles) in the system.

Should be good in a day or two.


Posted on Sep 28, 2009

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  • Ford Master
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Raise the truck up and turn the wheels left to right, you most likely have air in the lines.

Posted on Sep 28, 2009

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  • Ford Master
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WARNING BEFORE DOING THIS PROCEDURE BECARE IF YOU HAVE LONG SLEEVES - JEWRELY- LONG HAIR- KEEP IT AWAY FROM DRIVE BELT. YOU NEED TO BLEED POWER STEERING SYSTEM.WITH FRONT WHEELS IN THE STRAIGHT AHEAD POSITION.CHECK POWER STEERING FLUID.IF LOW ADD FLUID UNTIL FLUID REACHES COLD MARK ON THE DIP STICK.START ENGINE RUN IT FAST IDLE.THEN CHECK POWER STEERING FLUID AGAIN.PUT POWER STEERING PUMP COVER CAP BACK ON.WITH ENGINE RUNNING TURN STEERING WHEEL SIDE TO SIDE.WITHOUT HITTING A STOP.THIS WILL WORK AIR OUT OF SYSTEM.KEEP THE RESERVOIR FULL OF FLUID AS THIS IS DONE.WHEN THE AIR IS OUT OF SYSTEM.RETURN THE WHEELS TO THE STRAIGHT AHEAD POSITION.LEAVE VECHICLE RUNNING FOR SEVERAL MINUTES BEFORE SHUTTING OFF VECHICLE.ROAD TEST VECHICLE.MAKE SURE IT FUNCTION CORRECTLY FREE FROM NOISES.

Posted on Sep 28, 2009

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Power steering issues


I'm going to agree with the rack conclusion. Keep in mind I can't see it for myself.
If you take the load off the front wheels, you should be able to turn the steering wheel without effort.
If the effort changes while turning the wheel, the only things affected would be the rack and the column.
If you notice it turns ok with the engine off but not with the engine running, it could be something with the pump or one of the lines, or still something with the rack.

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Worn Steering Rack

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That will be the next thing to fail

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The steering in my 98 Buick Century is hard to turn at low speeds. Is this a steering pump issue or the rack and pinion?


Your PS pump is fine.

This vehicle has:

Variable-assist power steering: A power steering system that uses valves and speed sensors to vary the amount of steering assist according to engine or road speed. At slow speeds more steering assist is delivered and steering the wheels is easier; necessary for parking, etc.. At higher speeds, steering assist is reduced and more steering effort is required to steer the car, giving the driver greater feel of the road. Also known as Speed-sensitive power steering.

Loss of current to the magnetic coils would cause a loss of power assist at low speed. Coil resistance can be checked with an ohmmeter, and should read about two ohms. An infinite (open) reading indicates a bad coil (requires replacing the rack since the coils are not serviceable). Checking for shorts between both sides of the coil assembly and rack housing is also recommended.

Best wishes

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1 Answer

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make sure you bleed it well lock steering left and right and hold to make sure all pipe are full pf fluid and top up power steering

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There is a "pressure regulator" located in the pump just behind the high pressure line that directs high pressure fluid to the steering rack when you turn the steering wheel. It sounds like the regulator valve is sticking and not sending the high pressure fluid to the steering rack when you turn the wheel.
You can remove the pump and clean the valve, reinstall the pump and flush the steering system with fresh fluid or replace the pump and flush the system with new fluid.
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