1998 Mercury Marquis Swaying when I drive.

Tiny
WIZARD22
  • MEMBER
  • 1998 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 148,000 MILES
When I'm driving on the highway at 70mph or higher the car becomes extremely loose and feels like I'm going to lose control. The rear ends feels like it's fishtailing. Can this be the front or rear sway bar or is there something else I should check?
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Monday, November 2nd, 2009 AT 5:06 PM

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Tiny
SERVICE WRITER
  • EXPERT
I am inclined to suspect weak shocks. Try a bounce test. At each corner of the car, put your weight into it and push down. It should come back up and stop as opposed to it bouncing back down and then up again.
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Monday, November 2nd, 2009 AT 5:46 PM
Tiny
WIZARD22
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If this doesn't fix the problem what else could it be and could I replace the shcoks myself?
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Monday, November 2nd, 2009 AT 9:10 PM
Tiny
SERVICE WRITER
  • EXPERT
How was the bounce test?

Look at the shocks, is there oil seaping out of them, how do they respond. Is there other possiblilties, sure, but I would expect you would have other symptoms that are not normal.

What is the ride like otherwise? Any noises or odd occurances at other speeds? IS the ride ride on the bouncy side?

IF there is a bad bushing or a broken weld for example, you may hear something going over bumps.

I would be wise to check over the steering and suspension components in the event there are multiple reasons for the poor ride that are adding to the problem.
Do you have electronic suspension?

I'm not sure of your skills and tools, so I don't know what you can or can not do. If you live in a southern state or at least a mild winter area, the rust may not be a factor.

In this pic, the upper control arms are for side to side movement and the lower control arms are for front to rear movement.


http://www.2carpros.com/forum/automotive_pictures/30961_Zmar_1.jpg

If you have swaying combined with a floaty kind of ride, you may have both shock and upper control arm bushing problems.

What do the rear tires feel like when you run your hand over the tread surface of the tires. An indication of shock and or weak suspension is tire cupping.


http://www.2carpros.com/forum/automotive_pictures/30961_cup_1.jpg

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Tuesday, November 3rd, 2009 AT 4:18 AM

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