Power steering is hard, softens when I accelerate

Power steering is hard when the car is still then easens once I step on the accelerator. I have replaced the power steering pump and once the engine is running once can see the steering fluid circulating when you open the cap on the power steering reservoir. About two months ago I also replace the steering box. The car is pretty old so I get parts are getting to the end of their useful life, but at the same time its frustrating as it now has a new steering pump and steering box. The pipes have also been replaced. Will really appreciate your input on this.
My car has a manual transmission.
Experienced mechanics share their insights in answering this question :
Well given the symptoms, it sounds like the power steering pump is not putting out adequate pressure. When you replaced the power steering pump, did you use an OEM pump? If not, I would suggest having the power steering pressure checked, and replace the pump with an OEM pump if necessary to ensure the pump is good quality. Also, I know you said the pipes have been replaced, but does that include the pressure hose between the pump and the steering box? If not, that could be an issue as well.

You should also check the front end steering and suspension components, as a failing steering rod or ball joint could be binding, causing the steering to be stiff until it has enough pressure to overcome the bind.

If you want to have the steering problem thoroughly diagnosed, you can contact a qualified professional, such as one from YourMechanic.

How to Identify and Fix Common car Problems ?

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The most common cause of a stiff steering wheel is when you are running low on power steering fluid in your system. Often, this happens when there is a leak in the system from the pressurized hose area. Most of the time, it is due to a cracked or loose hose causing the fluid to leak out.
The most common cause of a stiff steering wheel is the lack of enough power steering fluid in the system. This condition can arise if there`s fluid leakage from the pressurized hose area. Refilling the liquid in the power steering tank will fix the problem for the time being, but the leak must be taken care of.
Low Power Steering Fluid

Your car will need its power steering fluid topped-up every once in a while, to ensure that the hydraulic power steering system continues to function smoothly. Signs of low power steering fluid include difficulty moving the wheel and steering, and a sluggish response when turning.

Rotating tyres regularly, and keeping down the uneven wear, helps to bring a better steering response. The inflation level of the tyres should be appropriate and upto mark. If this is not so, then the control of the vehicle is compromised, and so is the steering.
One of the most common problems power steering systems have is leaks. The high pressure of the system combined with the soft hoses carrying the fluid makes it relatively susceptible to leaks. A low fluid level can cause a whining power steering pump and even a loss of fluid pressure and a loss of steering assistance.
The driving speed, the power steering, the steering gear ratio, the friction on the ground and the mass centre position affected the steering effort largely.
You can drive with a bad power steering pump, but it`s not recommended. The pump is responsible for transmitting power to the steering wheel, so if it`s not working properly, you won`t be able to steer the car. In some cases, you may even experience difficulty braking the car.
Low Power Steering Fluid Symptoms

Steering Whine: If you hear a loud whining or screeching noise coming from under the hood when you steer, particularly if you turn the wheel as far as it goes, it`s likely due to low power steering fluid. Although, it might also be a bad pump.

A sure sign of air in the system is what sounds like a mildly disgruntled cat under the hood. This growling will get louder during power steering-intensive movements such as parallel parking. The first thing to check when the power steering starts moaning and groaning is the fluid level.
Because it`s an electronically-controlled system, it`s easy to alter the characteristics of electric power steering to suit individual preferences. Specifically, you can alter the steering weight to radically improve steering feel and high speed stability.
The only way you can affect the feel a car`s steering is by adjusting the air pressure of the front tires—and that will change the feel of the steering only to a minor degree.
The most obvious reason for your steering wheel vibration is warped rotors. When drivers push down on the brake pedal, pieces of metal called brake pads compress against the brake rotors to create friction which will then bring your vehicle to a stop. If you want smooth braking, you need a smooth surface.
The most obvious reason for your steering wheel vibration is warped rotors. When drivers push down on the brake pedal, pieces of metal called brake pads compress against the brake rotors to create friction which will then bring your vehicle to a stop. If you want smooth braking, you need a smooth surface.
On average, vehicles need a power steering fluid flush every 40,000-80,000 miles. In some cases, manufacturer recommendations can go even higher or lower than this range. Your recommended flush routine depends heavily on your type of vehicle—as the steering system and fluid needs can vary.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Power steering is hard, softens when I accelerate
ANSWER : Well given the symptoms, it sounds like the power steering pump is not putting out adequate pressure. When you replaced the power steering pump, did you use an OEM pump? If not, I would suggest having the power steering pressure checked, and replace the pump with an OEM pump if necessary to ensure the pump is good quality. Also, I know you said the pipes have been replaced, but does that include the pressure hose between the pump and the steering box? If not, that could be an issue as well.

You should also check the front end steering and suspension components, as a failing steering rod or ball joint could be binding, causing the steering to be stiff until it has enough pressure to overcome the bind.

If you want to have the steering problem thoroughly diagnosed, you can contact a qualified professional, such as one from YourMechanic.

Could the power steering pressure sensor cause my steering wheel to be hard or hard to steer?
ANSWER : Hello. The pressure switch (or "sensor") on your vehicle supplies a signal to the engine computer to increase engine idle speed as the power steering line pressure increases. If the switch were bad, what you would notice is the engine stalling or idle speed dropping very low as you turn the wheel toward the extreme left or right position.

If the engine is not slowing or stalling when you turn the wheel, then the switch is probably OK. Among the causes of excessive steering effort are very low tire pressure, low power steering fluid or trapped air in the system, damaged or loose power steering belt, and damaged steering rack.

If you would like to have this resolved, a certified professional from YourMechanic can diagnose your steering issue and follow through with needed repairs.

power steering fluid is leaking
ANSWER : With a power steering fluid leak that big, you certainly should have the vehicle inspected as soon as possible to find the exact cause. Any of the components you listed can be the source of the leak. The power steering pump as well as the rack & pinion steering unit rely on the fluid for lubrication as well as cooling. The whining you hear is from the pump when the fluid runs low or empty. Your issue can be caused by something as simple as a fluid hose right now, but continued ’running dry" of the power steering fluid, can result in damage to both the pump and the rack & pinion unit. If that happens, you can take what may be a repair of a few hundred dollars and turn it into a repair of a couple of thousand dollars.

Very loud pop when turning sharp left leaking transmission or power steering fluid where steering column meet rack
ANSWER : Hi there. If everything else has already been installed from the donor vehicle then it sounds like the high pressure hose is all that you need to install. The hardest part of doing this is the routing. One thing you may also want to double check is that the donor vehicle and your 2003 Escape have the same rack. There are different models depending on the model and the size of your wheels. You need to install the pressure line first, but if it does not line up then you may have the wrong rack installed. If you would like some assistance installing this hose, consider YourMechanic, as a certified mechanic can come to you to [replace your high pressure steering hose] https://www.yourmechanic.com/services/power-steering-pressure-hose-replacement

Major Leak of power steering fluid
ANSWER : Hello…it sounds like you have a loose or faulty hose connection. Of course, it is also possible that a coincidental leak developed, for instance in a rusted steel tube on the return side, at the same time that you were doing this repair. A YourMechanic specialist could diagnosis this for you and assist you with the repair of your power steering and inspect your vehicle for leaks.

had power steering pump replaced but power steering fluid is leaking
ANSWER : This suggests that you may have a leak somewhere else in your power steering system such as one of the hoses or the rack and pinion system. As you may know, the power steering system is a highly pressurized system that can have as much as 300+psi of pressure in the system at times, so it is not uncommon for these types of leaks to happen. If you’d like to get this fixed, I would recommend having an expert from YourMechanic come to your location to diagnose the leak in your power steering system and make the the necessary repairs to fix it.

Chrysler 3.8 L. T&C power steering rack and pump replacement.
ANSWER : As you may know, the power steering rack pumps power steering fluid through a series of small reed valves that help to produce hydraulic pressure as the system is pressurized by the pump. This is what allows the power steering system to assist you in steering your car. When either the pump or the rack is not working properly, one or the other can sometimes over compensate for the other to a certain degree, but will eventually be overworked and fail. It sounds like this may have been the case in your situation. I would suggest having a second opinion on the previous mechanic’s work. If you’d like a professional from YourMechanic can come to your home or place of business to properly diagnose and repair your power steering system.

I had a warning message in my 2013 Ford Fusion that the power steering assist failed. I have power steering capability now. Is it safe to drive?
ANSWER : Some 2013 Ford Fusion models are part of a safety recall involving loss of steering assist. Contact your dealer with the Vehicle Identification Number (VIN) or check your VIN number on safercar.gov to verify if this recall applies to your vehicle. Loss of steering assist can be dangerous if you are caught off guard. It would be best to not drive the vehicle. Contact your dealer to have it towed to their location.