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Steering is extremely sensitive at highway speeds?

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Old 04-13-2012, 08:23 AM   #1
brrymnvette
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Default Steering is extremely sensitive at highway speeds?

I just put a new steering rack on my car about a month ago and ever since, the steering has been extremely sensitive at higher speeds. Am I just imagining things, or is it supposed to be this way?
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Old 04-13-2012, 09:34 AM   #2
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Rack and pinion, twitch and you are in a ditch,

Also check tire pressures, if above 30lbs, will effect steering response. Did you take off the air dam? Front end could be lifting causing light front end at high speeds = quick steering.............
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Old 04-13-2012, 09:50 AM   #3
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Quote:
Originally Posted by brrymnvette View Post
I just put a new steering rack on my car about a month ago and ever since, the steering has been extremely sensitive at higher speeds. Am I just imagining things, or is it supposed to be this way?
Are you sure you hooked up the magnasteer connection when changed the rack? Check your codes using the dic. Interesting post by Bill Dearborn in this thread.
"When there is no electrical input to the Magnasteer it will default to a higher boost steering setting so the steering can be turned when parking the car. How did you check the codes? Using the DIC or using an OBD scanner. The codes are ABS codes since Magnasteer gets its inputs from the EBCM so you need to use the DIC or a scanner that can read ABS codes."

http://forums.corvetteforum.com/c5-t...r-failing.html
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Old 04-13-2012, 09:54 AM   #4
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I checked the codes with a scanner. But I didn't check any ABS codes. I'll do that and see what I find. Thanks, that's the type of info I was looking for.

And yes, I did plug back in the connection. I actually did it a couple times now thinking that may have been my problem.
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Old 04-13-2012, 10:10 AM   #5
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Don't know, but when I bought mine a couple months ago, I drove it 1400 miles from Vegas and the front end seemed touchy, skitish. I got a front alingment and she's solid as a rock now. Night and day difference.
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Old 04-13-2012, 10:12 AM   #6
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Yeah, I thought about that too, but I've had it on the rack 5 times to check, and recheck, and recheck.
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Old 04-13-2012, 11:49 AM   #7
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[QUOTE=brrymnvette;1580544402]I checked the codes with a scanner. But I didn't check any ABS codes. I'll do that and see what I find. Thanks, that's the type of info I was looking for.

The best scanner to use is the one that came with the car. It will display all the codes. Here's how: http://www.c5forum.com/ayc/dtcdic.php
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Old 04-13-2012, 12:14 PM   #8
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Check ALIGNMENT. Among other things, close to "0" toe will cause this type of symptom (darting).
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Old 04-13-2012, 03:13 PM   #9
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Quote:
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Check ALIGNMENT. Among other things, close to "0" toe will cause this type of symptom (darting).
I'm thinking not enough Caster. The caster should be in the 6.5* to 7.5* range.
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Old 04-13-2012, 03:20 PM   #10
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That too. He needs a good four wheel alignment and I would bet his issues go away.
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Old 04-13-2012, 05:41 PM   #11
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I'm thinking not enough Caster. The caster should be in the 6.5* to 7.5* range.
True, but the OP changed the rack, which, I believe, does not require removal of the lower a-arms, therefore, the caster shouldn't have changed.
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Old 04-14-2012, 02:46 AM   #12
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True, but the OP changed the rack, which, I believe, does not require removal of the lower a-arms, therefore, the caster shouldn't have changed.
I thought of that very thing too, but he never said what all was removed, dismantled, or replaced in addition to just the rack.

Either way, I agree with PFRC, he at least needs a good 4-wheel alignment for starters.
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Old 04-14-2012, 11:56 AM   #13
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I just got back from the shop. I tested the entire system and it's the VES sensor. Guess I'm pulling the rack back out and trying to get it replaced under the warranty from the vendor.

Alignment has been done boys, I know it's spot on b/c I did it myself. One of the benefits of having a fully equiped repair shop at my disposal.
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Old 04-14-2012, 09:12 PM   #14
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Quote:
Originally Posted by brrymnvette View Post
I just got back from the shop. I tested the entire system and it's the VES sensor. Guess I'm pulling the rack back out and trying to get it replaced under the warranty from the vendor.

Alignment has been done boys, I know it's spot on b/c I did it myself. One of the benefits of having a fully equiped repair shop at my disposal.
post your alignment measurements.
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Old 04-14-2012, 09:55 PM   #15
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Quote:
Originally Posted by SaberD View Post
post your alignment measurements.

They are the factory Z06 alignment specs. Nothing special. If you really want, I can go hook the alignment rack back up this week and take a picture of the readings, just to satisfy your curiosity.
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Old 04-14-2012, 11:54 PM   #16
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when I ran a Z06 alignment my car WAS darty...recently went back to the standard coupe alignment specs and the car is quieted down...I like it a lot better, a lot more confidence now behind the wheel.
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