99 Deville Floats side-to-side
Thread Starter
Joined: Apr 2008
Posts: 3
99 Deville Floats side-to-side
Hello
I'm trying to help my son with his 99 Deville.
Regarding the suspension, it drives really poorly. I'm not sure how to describe it. Like when landing in a plane on a windy day and you see you are not straight and you wonder how the pilot will land it? Is that call "yaw"? At speeds above 40 mph it starts this side-to-side motion. Almost feels like the tires had 5 lbs of air and had no sidewall stability.
So my call is the shocks. However, I'd like to ask you guys to make sure you don't think it is something else. Classic bad shocks would have the car bouncing for a while over bumps, or a tire could go into oscillation if REALLY bad.
I'll also pull the codes and see if there are any suspension diagnostics being flagged.
Thanks again for your help.
I'm trying to help my son with his 99 Deville.
Regarding the suspension, it drives really poorly. I'm not sure how to describe it. Like when landing in a plane on a windy day and you see you are not straight and you wonder how the pilot will land it? Is that call "yaw"? At speeds above 40 mph it starts this side-to-side motion. Almost feels like the tires had 5 lbs of air and had no sidewall stability.
So my call is the shocks. However, I'd like to ask you guys to make sure you don't think it is something else. Classic bad shocks would have the car bouncing for a while over bumps, or a tire could go into oscillation if REALLY bad.
I'll also pull the codes and see if there are any suspension diagnostics being flagged.
Thanks again for your help.
Tech Certified Members
Joined: Jun 2007
Posts: 2,701
RE: 99 Deville Floats side-to-side
ORIGINAL: Peter_Reinhard
Hello
I'm trying to help my son with his 99 Deville.
Regarding the suspension, it drives really poorly. I'm not sure how to describe it. Like when landing in a plane on a windy day and you see you are not straight and you wonder how the pilot will land it? Is that call "yaw"? At speeds above 40 mph it starts this side-to-side motion. Almost feels like the tires had 5 lbs of air and had no sidewall stability.
So my call is the shocks. However, I'd like to ask you guys to make sure you don't think it is something else. Classic bad shocks would have the car bouncing for a while over bumps, or a tire could go into oscillation if REALLY bad.
I'll also pull the codes and see if there are any suspension diagnostics being flagged.
Thanks again for your help.
Hello
I'm trying to help my son with his 99 Deville.
Regarding the suspension, it drives really poorly. I'm not sure how to describe it. Like when landing in a plane on a windy day and you see you are not straight and you wonder how the pilot will land it? Is that call "yaw"? At speeds above 40 mph it starts this side-to-side motion. Almost feels like the tires had 5 lbs of air and had no sidewall stability.
So my call is the shocks. However, I'd like to ask you guys to make sure you don't think it is something else. Classic bad shocks would have the car bouncing for a while over bumps, or a tire could go into oscillation if REALLY bad.
I'll also pull the codes and see if there are any suspension diagnostics being flagged.
Thanks again for your help.
inflate tires to 34psi and test drive .. if it is the same, swap tires front to back and report back.
Joined: Sep 2007
Posts: 5
From:
RE: 99 Deville Floats side-to-side
Had same condition on 98 DeVille wih high mileage (114,000+). Problem solved with installation of new rear suspension parts. Have them check for wear. (Wife was following me in another car and noticed that rear wheels did not track properly) Gene Hamilton Indianapolis, IN
Super Moderator
Joined: Feb 2007
Posts: 1,646
RE: 99 Deville Floats side-to-side
ORIGINAL: Gene Hamilton
Had same condition on 98 DeVille wih high mileage (114,000+). Problem solved with installation of new rear suspension parts. Have them check for wear. (Wife was following me in another car and noticed that rear wheels did not track properly) Gene Hamilton Indianapolis, IN
Had same condition on 98 DeVille wih high mileage (114,000+). Problem solved with installation of new rear suspension parts. Have them check for wear. (Wife was following me in another car and noticed that rear wheels did not track properly) Gene Hamilton Indianapolis, IN
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