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97chevy350 Enthusiast

97chevy350

Posted
Posted

Ok here goes, Today I took my EVO sensor off and cleaned it with WD-40. Much firmer steering which Im very glad about though I get some squealing from the pump. Heres the problem, I took it out for a ride, and I i can hear this kind of clicking sound, kind of like riding a bike and not pedaling. Heres the thing, it gets louder and speeds up with RPM's nothing with the steering as I did it at idle. So I popped the hood and reved it while i listened under the hood and coundt hear anything! I could still here it in the cab and its coming from under the driver side dash but I cant find it. Any help would be GREATLY appreciated!!!! O yeah, I didnt put any foam back on the EVO sensor connector.

bobcat5544 Enthusiast

bobcat5544

Posted
Posted

really nothing the click noise has to be inside the cluster it's self. the only other click noise that it can be with the area you were in is a vacuum line leak that goes to the ac/heater blend door or mode door actuator, but they usally not rpm related

sgiangregorio Enthusiast

sgiangregorio

Posted
Posted

Can you tell me a little more about the "EVO Sensor"? What does it do, where is it located, and why/how does it firm up your steering?

 

Here's why I ask. I have a 2002 Tahoe Z71 that just got new tires and an alignment. It feel sloppy now, in the wheel. The shop said "we just do a regular old alignment on the machine, we don't touch the steering box or anything, but we noticed the play too."

 

I wondering if something like this EVO sensor should be looked at. I have nothing to loose.

 

Thanks.

97chevy350 Enthusiast

97chevy350

Posted
  • Author
Posted

The evo sensor is located at the base of the steering column. It controls how much power assist you get from the powersteering pump. When it goes bad/gets dirty, the steering will get very sloppy (it is giving you much more assist than you need) It will also tend go give a jerk every onec and while as you are making a steady turn). Mine did it to the right. The steering was always sloppy since I got the truck, but I didnt get the steering jerk until I got my new tires put on, kind of similar to your situation. Some people replace it but many just take it off and clean it with WD40, as I did today. It worked very well for me, I have a much better feeling steering wheel now. I beleive the setup is slighty different on the NBS. But this may help, on mine, all you have to do is disconnect the steering shaft(on mine there was one bolt thorugh it) near the firewall and slide it foreward into the engine bay. Then slide the sensor out (Mine looks like a big plastic ring inside of another below the colum brace. You will have to follow the wires up to the connector, which is wrapped in foam tape and quite tricky if you dont take all the foam off. Take it out and clean it up with some good ole WD 40 and put it back in. If you have anymore questions send me a PM and I will be glad to help.

 

Tony

97whitez71 Enthusiast

97whitez71

Posted
Posted

My '97 had that clicking noise one time. I drove several miles trying to figure out what it was. Ended up being the trip odometer. When I stopped to fill up I reset it, but it didn't go back to exactly 0000. It was caught between 0000 and 0001. Pushed the button firmly and fixed the clicking. Hopefully your clicking is as simple to fix as mine was. Good luck.

97chevy350 Enthusiast

97chevy350

Posted
  • Author
Posted

As far as I know, your 03 should have one, I think they are different than the OBS but i think they are still at the base of the steering column near the firewall.

 

 

I already tried the trip odometer... thanks though! If its in the cluster Im gonna be mad :cheers:

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
Ok here goes, Today I took my EVO sensor off and cleaned it with WD-40.  Much firmer steering which Im very glad about though I get some squealing from the pump.  Heres the problem, I took it out for a ride, and I i can hear this kind of clicking sound, kind of like riding a bike and not pedaling.  Heres the thing, it gets louder and speeds up with RPM's nothing with the steering as I did it at idle.  So I popped the hood and reved it while i listened under the hood and coundt hear anything!  I could still here it in the cab and its coming from under the driver side dash but I cant find it.  Any help would be GREATLY appreciated!!!!  O yeah, I didnt put any foam back on the EVO sensor connector.

 

 

 

 

 

Did you push out the rubber boot on the steering shaft? If you did it will let in all sorts of noise. Don't ask me how I know this... :cheers:

sgiangregorio Enthusiast

sgiangregorio

Posted
Posted

Thanks. I wonder if I can track it down on my NBS Tahoe then. I have to grease the intermediate steering shaft anyway, so I'll already have the shaft out.

 

I don't suppose you have a picture?

 

Thanks again.

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
Thanks. I wonder if I can track it down on my NBS Tahoe then. I have to grease the intermediate steering shaft anyway, so I'll already have the shaft out.

 

I don't suppose you have a picture?

 

Thanks again.

 

 

 

 

 

I don't have that but you can't miss it. Make sure you use a silicone spray when you put it back in. Makes it alot easier.

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