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Username Post: Power steering pump sensor        (Topic#348880)
bowtie44s 
Valued Contributor
Posts: 3965
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
12-27-17 03:41 PM - Post#2719146    

I had to change the power steering pump on my 02 Suburban. What's this sensor? It has to be some type of knock sensor. It just slides over the stud.


Jeff

'88 Chevy K3500, aluminum head roller cam 511in³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
bowtie44s 
Valued Contributor
Posts: 3965
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
12-27-17 07:20 PM - Post#2719162    
    In response to bowtie44s

I figured out it is the EVO sensor. I didn't know I had EVO. I have no idea how it works. It just slides over the stud and is held on with a snap ring. Would unplugging it give me full power steering all the time?

Jeff

'88 Chevy K3500, aluminum head roller cam 511in³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
454cid 
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Posts: 2855
454cid
Age: 45
Loc: West Michigan
Reg: 02-18-12
12-27-17 10:00 PM - Post#2719174    
    In response to bowtie44s

Haha, why would have a knock sensor in your power steering?

I think disconnecting it would give full power all the time, but I don't think you want that..... I think going down the road at higher speeds would be twitchy. Some GMT-400 guys get rid of it, by going to prior year components. I've researched it a bit before, but not having actually done any conversion on my truck the specifics didn't stick with me.

99 K3500 RCLB


 
someotherguy 
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Posts: 28696
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
12-28-17 09:18 AM - Post#2719201    
    In response to 454cid

There's a bypass kit you can install there. I can't speak for how it behaves if you simply disconnect it, but it would be easy to try, just don't do so in busy traffic as the results could be unpredictable.

EVO (electronically variable orifice) steering is supposed to provide more steering assist at low speeds, to make parking maneuvers easier, while limiting it at highway speeds to increase stability. The most common failure mode is that it gives full assist at all times, making highway driving pretty sketchy. The part that usually fails is the sensor on the steering column.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
rockfangd 
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Posts: 2436
rockfangd
Age: 32
Loc: Utica ny
Reg: 04-13-10
12-28-17 11:21 AM - Post#2719215    
    In response to someotherguy

yup. At the base of the column.
When it fails it makes it full assist all the time.
We had a 97 that had it. Would turn on a dime in seconds.
But turned great on the highway. Til it failed. Then it turned too easily on the highway.
It is a feature that can be lived without if it never had it but if it does and it fails then you will notice

Old School GM fan FOREVER


 
bowtie44s 
Valued Contributor
Posts: 3965
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
12-28-17 12:03 PM - Post#2719218    
    In response to 454cid

  • 454cid Said:
Haha, why would have a knock sensor in your power steering?



I thought maybe it would turn on a light if the pump was knocking. I have no idea how I works because it just slides over the stud and doesn't connect to anything. I thought maybe it would sense vibrations.

I could kick myself because I took the EVO off of my old pump and sent the fitting back I need to bypass it with the core. GM makes a bypass kit (19168825) but it's $65. With no you pull junkyards within a 2 state radius, I will just wait until it causes problems.

Jeff

'88 Chevy K3500, aluminum head roller cam 511in³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
someotherguy 
Moderator
Posts: 28696
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
12-28-17 12:53 PM - Post#2719222    
    In response to bowtie44s

If you use the non-EVO fitting that goes into the pump, vs. the GM kit that is marketed as the EVO bypass...you also need to buy a hose for a non-EVO truck so it all lines up, so the cost probably works out to near the same. The pricey piece of tube GM sells is so you can continue using the hose that comes with your truck.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
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