Poor Highway Stability - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-11-2007, 12:44 PM   #1
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Default Poor Highway Stability

yesterday I was going about 75mph or so and the winds were about 12-14mph. The car felt like it was floating, and not in a good way. My steering felt extremely light (I thought this had nagnasteer?) and it was really uncomfortable, the car felt liek it was all over the place. Now I know you're goign to say "check your struts" but these are new AC Delco struts installed not too long before I bought the car. I mean, it wasn't dangerous or anything, but I just expected better stability and isolation too (lots of wind/road noise). I never noticed it before because I live in a rural area where we don't have expressways and we never usually take my car when we are on them. I like the car, just don't know why it drove like that. (all suspension components have been checked and are good.) I have newer Goodyear Comfortred tires on it, maybe those might be a cause?
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Old 03-11-2007, 10:22 PM   #2
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Did they do an alignment after the struts were installed, do you know? Improper alignment, and improper/unequal tire pressure can cause problems similar to that.
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Old 03-11-2007, 11:01 PM   #3
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Default Re: Poor Highway Stability

Quote:
Originally Posted by marquette97
yesterday I was going about 75mph or so and the winds were about 12-14mph. The car felt like it was floating, and not in a good way. My steering felt extremely light (I thought this had nagnasteer?) and it was really uncomfortable, the car felt liek it was all over the place. Now I know you're goign to say "check your struts" but these are new AC Delco struts installed not too long before I bought the car. I mean, it wasn't dangerous or anything, but I just expected better stability and isolation too (lots of wind/road noise). I never noticed it before because I live in a rural area where we don't have expressways and we never usually take my car when we are on them. I like the car, just don't know why it drove like that. (all suspension components have been checked and are good.) I have newer Goodyear Comfortred tires on it, maybe those might be a cause?
I'll take dibs on rear toe-in being off if there'* not a loose/worn part somewhere.

How are the rear tires? ARe they lowest on tread> I've found since I moved my most worn tire to the rear I can tell the difference in wander. They have about 4/32 compared to 6/32 for fronts. The also were rounded on edges because I intentially ran them more on the front thinking I'd replace them for a good pair of Michelins for the front this winter. Didn't need to.
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Old 03-12-2007, 12:40 PM   #4
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The rear tires are pretty fresh still. My experience with these tires has been poor. They won't balance, and the car vibrates above 65-70mph. I have had them balanced twice and rotated a few times, not much luck.
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Old 03-12-2007, 02:32 PM   #5
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MmmmMMMhh.

Tie rod ends? Greased them lately?
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