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120km/h car feels unstable

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Old 03-28-2007, 08:29 AM
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Default 120km/h car feels unstable

99 integra gs, koni yellow shocks, h&r sport springs

driving on the highway lately my car feels very unstable.. it's not shaking uncontrollably but it does seem to sway and jerk - sometimes

i usually only feel this when i'm going 120 or so. the slower i go, the less i feel it.... it feeling is exactly as if the car had a flat tire. i know pressure is good, the tires are not bald and have lots of tread... it actually happened when i had snow tires and i switched to my all seasons last week and i still feel it. it feels very unsafe and i'm always nervous driving it now.

tires are all at proper optimal pressure
lugs are all at 85 ft-lbs
lots of brake pad left on all 4 calipers

what can or should i be checking? alignment? possibly missing cotter pins and some nuts came loose? i don't know.. i'll be jacking it up this afternoon to take a quick peek but i at least would like to know what could be possible causes.
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Old 03-28-2007, 08:36 AM
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i need to read the whole post before i respond opps

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Old 03-28-2007, 09:01 AM
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Wouldn't hurt to get an allignment. Could be a wheel or two is really out of ballance, but if its happening with both sets of wheels, seems unlikely. Make sure all nuts and bolts are there, and everything is tight. Could be uneven wear on a tire. If you have bad allignment that has caused an odd wear pattern, and now you may have put them back on in a different position and its causing a weird vibration.

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Old 03-28-2007, 09:17 AM
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sounds like alignment to me... you should also mention what rims and tires you have. lower profile tires are much more responsive to ruts and grooves in the road and will jerk the steering wheel on occassion.
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Old 03-28-2007, 09:21 AM
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oops...

14" steel winter rims, magna grip tires, 185/65/14
15" oem ls mesh, bridgestone potenza, 195/60/15
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Old 03-28-2007, 08:48 PM
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it's either your bushings are shot, or your alignment is screwed. Also bad bushings will screw up an alignment as the bushings move/change under acceleration, braking turning and coasting, ask me how I know.
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Old 03-28-2007, 10:12 PM
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It could possibly be your front ball joints
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Old 03-29-2007, 03:52 PM
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All joints seemed to be in tact, no boots ripped either. All the nuts and cotter pins were in place. I might try an alignment but I just got an alignment done at Gilman's last summer. If I'm to inspect the bushings, what would I be looking for? Dry? Cracked? Also, which specific bushings? I was reading around Honda-Tech and I found that bushings should be replaced as needed as opposed to me getting an entire energy black kit.

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Old 03-29-2007, 07:44 PM
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look for cracked, dry rot, peeling, stripped, misshaped or even missing bushings. Check both sides as well.


In 2005 I had two alignments within 6 months of each other. I never changed the height of the car, only swapped rims...finally I brought it to gilman and was talking to him about my alignment specs not staying and first thing he said was bushings. When we changed Fuzzy's lower control arms for newer ones night and day difference same with once we changed platty p's over. Shitty part was that they needed another alignment.
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Old 03-30-2007, 06:21 PM
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Originally Posted by its me.. mario View Post
99 integra gs, koni yellow shocks, h&r sport springs

driving on the highway lately my car feels very unstable.. it's not shaking uncontrollably but it does seem to sway and jerk - sometimes

i usually only feel this when i'm going 120 or so. the slower i go, the less i feel it.... it feeling is exactly as if the car had a flat tire. i know pressure is good, the tires are not bald and have lots of tread... it actually happened when i had snow tires and i switched to my all seasons last week and i still feel it. it feels very unsafe and i'm always nervous driving it now.

tires are all at proper optimal pressure
lugs are all at 85 ft-lbs
lots of brake pad left on all 4 calipers

what can or should i be checking? alignment? possibly missing cotter pins and some nuts came loose? i don't know.. i'll be jacking it up this afternoon to take a quick peek but i at least would like to know what could be possible causes.


Maybe its just windy outside.
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Old 03-31-2007, 02:05 PM
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I'm going to swap out those Omni rear LCA's ... I've read they have bushing problems..... I'll see how the car reacts then.
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Old 01-21-2008, 04:39 PM
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i know this is an old post but did u fix the problem, im having the exact same problem and i have the same set up (koni's with H&R)
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Old 01-21-2008, 09:26 PM
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are the tires feathered? (uneven wear on the outter edges of the tires)?
when's the last time you got the rims balanced?
did you hit a bad pothole or something, maybe bent a rim?
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Old 01-22-2008, 12:12 PM
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Originally Posted by hi-speed performance View Post
are the tires feathered? (uneven wear on the outter edges of the tires)?
when's the last time you got the rims balanced?
did you hit a bad pothole or something, maybe bent a rim?
it all started to happen when i put my winter tires on my stock rims and i got them balanced that same day....didn't hit anything bad....so no idea what it can be??
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Old 01-22-2008, 02:00 PM
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Were the snow tires new or used?
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Old 01-22-2008, 02:02 PM
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Maybe you need your wheels to be balanced. Im sure its that.
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Old 01-22-2008, 02:18 PM
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maybe a front bearing
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Old 01-22-2008, 07:22 PM
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Originally Posted by hi-speed performance View Post
Were the snow tires new or used?
New

Originally Posted by integra_101 View Post
Maybe you need your wheels to be balanced. Im sure its that.
They were balanced when I put them, not even a month ago??.
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Old 01-24-2008, 10:48 PM
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could be bad tires, it happens sometimes or the person who balanced them did not do it properly.
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Old 01-26-2008, 01:06 AM
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if your checking your front end you need the wheels off the ground, you can check the inner and outer tie rods by moving the wheel back and forth but you would need a pry bar to check your ball joints or control arm bushings.

if any of the above is bad enough on the car to make it sway or handle bad...you would be hearing lots of noise too.

i think your problem is camber wear on the tires or the front toe is out(positive)
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