First check the condition and level of p/s fluid. if low top off first and turn your steering wheel left to right and back several times to try to bleed air out of p/s system. if p/s is still stiff or hard your p/s pump pressure output can be measured with a pressure gauge. if pressure is below specs its time to replace it. if your p/s output pressure is good then you would need to inspect your p/s hose or lines for kinks or restrictions to your steering rack. on certain model vehicles p/s sensitivity can be adjusted on the steering rack. you would need to check the vehicles service manual to see if its possible to adjust steering rack sensitivity.
SOURCE: 1997 chevy lumina-very hard to turn to left
Most of the time the pump will make a whining noise when used. this is a warning for a bad malfunctioning pump. if there is no noise during a hard turn, it will most likely be an issue with the steering assembly. heres a step by step guide on checking the pump.
Step1
Check the fluid levels of your vehicle first. Add power steering fluid if necessary before you proceed any further.
Step2
Connect the power steering pump and hose to the pressure gauge and
shutoff valve. Fit the hose to the power steering pump correctly. Make
sure the shutoff valve is open before test the power steering pump.
Step3
Idle the engine
while turning the steering wheel all the way to the right and all the
way to the left to release any air from the power steering pump.
Step4
Close the shutoff valve to check system pressure for about 5 seconds.
If the shutoff valve is closed longer than 5 seconds, your power
steering pump can overheat and this can cause damage to the pump
itself.
Step5
Compare the pressure reading against the manufacturer's specifications.
If the pressure is within limits, your power steering pump is working
correctly and you're ready to roll.
Step6
Troubleshoot if the pressure reading is not the same as the manufacturers specifications. Consult the manual for your vehicle or for your power steering pump (if you just installed a new one) to determine the source of any further problems.
SOURCE: Van starts, runs fine, then puts at low speed and dies when idled
If you have a check engine light on, than it is likely a sensor that needs to be replaced. If filter has been changed, you may have weak fuel pressure, or a bad sensor. A leaky fuel injector will also cause this
SOURCE: 98 F.Windstar replace power steering pump but still hard to steer
rack and-or pinion... Good thing the 98 is a very good and popular windstar, its not as bad as it sounds.
SOURCE: In my 2005 V6 Buick
Hi sound like you need to replace the rack and pinion .when ps pump is replace you had to flush the entire fuid from the system if not all the contaminants will get to whole system again .
SOURCE: 99 chevy lumina 94k mi transmission stopped working. Fluid good.
check fluid level, make sure proper fluid is in transmission otherwise take to trans shop to diagnse if level and type is correct(check at idle normal operating temp)
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