When vehicle is stationary and turning wheel a juddering and jerking starts i have bled the steering fluid for air when driving slow it happens when turning also when going round corners it sticks and i have to pull it back every thing seems ok undernieth is it the pas box or pas pump how do i find out which bit is at fault ...it still happens when wheels are off floor
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could be a differential problem, or half shaft broken where power is only going ot one wheel. when the car accelerates the wheel with power can cause the vehicle to jerk. could also be a wheel problem. ensure the tyres are inflated correctly. is the steering wheel straight or turned to one side when driving in a straight line. if turned there may be damage to the steering system. did the symptom start after another person has driven the vehicle? or after an accident or driving into a curb or off road? all these may be factors to the problem. if not the case try rotating the wheels front left to rear right and front right to rear left to see if the problem disapears. if persists seek professional to test drive the vehicle and give an appraisal to the cause.
this problem is evident in vehicles that have a strut suspension
at the top of the strut there is a plate that is the top plate for the suspension coil spring
above that plate in the rubber bush is a bearing
if that bearing has failed then the plate will not turn and when you turn the steering wheel the power steering is in effect winding up that coil spring
that makes low speed turning very heavy on the power steering system especially at low rpms
have the front suspension checked for that bearing failure ( both sides ) by an accredited suspension specialist shop
standing stationary and turning the wheel you may even hear a creaking or groaning noise as the spring is flexing on the strut
if you do not have a strut suspension , take it to a power steering specialist shop for a proper diagnosis
This should not have damaged anything! If your experiencing problems with your system you may have a bad power steering pump, or obviously a defect in the rack and pinion, Hopefully the vehicle is still uder warranty! If it is, take it to a ford delearship, and let them fix the problem for you. As long as your steering system is functioning properly, you should be able to turn your steering fully in all directions while sitting stationary all day long, without any problems
In my experience the steering issue is unrelated to your car sputtering.
#1 Sputtering is the result of engine misfires, poor or improper fuel delivery, and/or inadequate air delivery. Hesitation and noises at standard shift points (ie: 3500+ RPM depending on how heavy your foot is) is a side effect of a faulty transmission, or transmission components (solenoids, torque converters, gears, etc.)
#2 Turing your stering wheel while the car is stationary will not damage your vehicle. The stering wheel system in your car is as you mentioned power assisted. The rack and pinion (steering gear) actually performs the function of moving the wheels. The system is pressure lubricated by the power steering pump via high pressure lines. Air in the system may damage the rack, but is more likely to damage your pump fist. Difficulty turning the steering wheel on a vehicle equipped with power steering can be the result of a damaged steering gear (rack and pinion), A damaged rack is unlikely unless the car was in a collision, or the car was run for an extended duration of time with no power steering fluid. The latter is less likely because the sound of a dry pump would be obvious and extremely noticable.
#3 You should take your vehicle to another dealer and start keeping documents provided by the dealer follwoing inspection or service. The dealer must honor their warranty, as a contractual agreement. I am not sure what state you reside in but, you could qualify for vehicle replacement under some states lemon law provisions. Google lemon law to learn the steps you can take if you feel like your brand new car may qualify.
Stationary steering doesn't harm your vehicle, but putting the power steering stop to stop on each side can cause damage to the pump, which runs off of the engine belt. The first thing I would do is to get the power steering pump and steering rack inspected by a shop that will honor your warranty.
P.S. - This shouldn't void your warranty, it's a common mistake.
The power steering pump pumps fluid through the power steering rack or gear box assembly. when you move the steering wheel the fluids pressure helps you to turn the wheel by puhing on one side of the rack or the other. You can turn the wheel asmany times as you want with it stationary and nothing will happen.
Sounds like you have air in your steering system. I would start by looking for any leaks on your steering system like hose to fitting crimps, steering pump, etc. Check your steering fluid level to make sure it is full and also look for bubbles on the dip stick. If everything looks good, start the vehicle and turn the wheels all of the way to the left and then to the right. Do this while the vehicle is in park and repeat at least 5 times. This will work out any air in your steering system. If the problem persists then the power steering pump may need to be replaced.
It might be a faulty power steering pump. Try checking the level of the power steering fluid. It is probably best you have your power steering system checked by a mechanic.
Does the noise occur only when the vehicle is moving?
Try moving the steering wheel from side to side, while stationary (but don't do it too often, or you might damage something). If the noise is still present when the car is stationary, then it probably is the power steering system.
If the noise only occurs while the vehicle is moving, it could be a problem with the differential/final drive, or even wheel bearings.