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Jerky Power Steering

billbarr100

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billbarr100 Enthusiast

billbarr100

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When i'm turning at speed somtimes the truck will over power assist with power steering causing me to abruptly jerk into the turn more. It is really annoying. Does anyone know what causes this? It is full of fluid, looks to be atf, or some other red power steering fluid.

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

It adjusts the power assist for different speeds, I can't remember the fix but someone will know, it's becoming a common problem. Have you tried the broken search?

Bish Senior Enthusiast

Bish

Posted
Posted
When i'm turning at speed somtimes the truck will over power assist with power steering causing me to abruptly jerk into the turn more.  It is really annoying.  Does anyone know what causes this?  It is full of fluid, looks to be atf, or some other red power steering fluid.

 

 

 

 

It would help if you gave us the year make and model.

 

I will tell you that from about 98 up, there is an EVO sensor that calculates the rate of turning the wheel and adjusts power steering power accordingly. It is a donut like thing around the steering shaft above the brake pedal. You can replace it or some have had success blasting it with WD-40 between the donut and the steering shaft.

 

This is a common failure and is possibly the problem but a loose front end could cause similar symptoms.

bob1527 Enthusiast

bob1527

Posted
Posted

my dad has this problem too, but he had a 97 yukon. at highway speeds if you were rounding a corner, the steering wheel would jerk a little. it was annoying.

billbarr100 Enthusiast

billbarr100

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ya, its a 97 gmc 1500. So that evo thing is at the base of the shaft inside the vehicle? and can it be repaired with some quick fix or does it have to be replaced and if so how much are they and how hard is it?

bronyaur Enthusiast

bronyaur

Posted
Posted

This photo is from my 1999 K1500 P/U (OBS) so it should look fairly close. The red arrow is the EVO sensor, the yellow arrow is the electrical connector:

 

evosensor.jpg

Bish Senior Enthusiast

Bish

Posted
Posted
what happens if you just unplug it?

 

 

 

 

You loose variable assist in the steering and it probably sets a code(SES). I know you can disconnect it for testing but I'm not sure I would want to keep it that way.

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