2007 Cadillac STS V8 WORST RIDE QUALITY! Help! - Page 3
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Cadillac STS Forum - 2005 through 2012 Discussion, 2007 Cadillac STS V8 WORST RIDE QUALITY! Help! in Past Cadillac Vehicle Discussion; My dad use to run many horses down at mountianeer! He only has one now though....
  1. #31
    1BadCadSTS's Avatar
    1BadCadSTS is offline Cadillac Owners Connoisseur
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    My dad use to run many horses down at mountianeer! He only has one now though.


  2. #32
    Carvone is offline Cadillac Owners Fanatic
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    Quote Originally Posted by Karsntrux View Post
    Was yours similar to what I was describing, like skating on ice? Prior to replacing the struts?
    Another odd question, does your STS have a wood grain strip down the center of the gear selector? Mine doesn't, and every one I see with wood trim has it. I have all the other wood trim, just not on the gear selector.
    No my car did not ride anything like you describe, even with bad front struts. I do think "Tourist" is on too something though, it sounds 'from what you describe' that the rear shocks are all the way aired up and making it ride like that C3500 work van. Go check out that place that does MRC work and they would be able to tell you what is wrong within the hour most likely. Also your likely to get off relatively cheap, sounds like the shocks are doing their job and it is the air pump or switch that is defective. (just guessing though)

    Yes, my gear shift has the same wood grain in the middle of the knob as is on the dash, console and doors. You easily switch that out on yours if you ever run across one you like at a junk yard or on ebay. Good Luck.

  3. #33
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    There are two different systems on the STS, depending on the suspension options.

    The tests you describe indicate serious issues that any dealer should be able to fix.

  4. #34
    jimmbo is offline Cadillac Owners Fanatic
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    These cars ride like they have wooden tires

  5. #35
    Ludacrisvp's Avatar
    Ludacrisvp is offline Cadillac Owners Connoisseur
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    Quote Originally Posted by jimmbo View Post
    These cars ride like they have wooden tires
    Lol indeed

  6. #36
    Billysurcan is offline Awaiting Email Confirmation
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    My 2007 acts exactly the same. I'm told the front struts are gone but I'm not sure. Mine doesn't respond to the ride switch from touring to perf.
    I have found that if I disconnect the battery, and cause the onboard computer to reboot that the car seams to ride better for a short time.
    The computer is suppose to read the shocks 1000 times a min., and I wander if the computer is at fault. The car doesn't appear to be sitting low
    but rides as if the front has no shocks at all.

  7. #37
    MIVet28 is offline Cadillac Owners Member
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    Karsntrux, I had the exact same issues with the 06 1SG I bought last August. EVERY single bump, crack or manhole cover would make the car shutter and feel like it was going to explode. I was considering selling the car, but, to my surprise, the front lower control arm bushings were destroyed. Once I replaced them(replaced both LCAs), it was much much better. At the time, the struts were all aftermarket and the previous owner had applied the ole resistor trick to all four corners. I replaced all four with OEM struts and the ride improved greatly, but a break in the wiring at the front right wheel speed sensor was preventing the ABS, T/C, stability system and adaptive cruise control from coming on. I got that straightened out this weekend and everything came back to life. This car is riding beautifully now. One last fix I have yet to do is replace the air lines for the rear leveling system. I'm expecting an even better ride by next Sunday when that's complete.

    Hope this helps!

  8. #38
    2manyhotrods's Avatar
    2manyhotrods is offline Cadillac Owners Fanatic
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    Quote Originally Posted by Karsntrux View Post
    I'm in a jam here. I LOOVE my 2007 Cadillac STS V8 RWD, F55 Magenride, with Sport Suspension, I believe FE3. It's what I believe to be on of the rarer cars, 6 Lug Wheels and Hubs, which I've been told is from the CTS V, but mine are stock. Brembo Brakes front and rear. Not a V. All stock. EG Grille and Body Kit.
    I love this car, but this is the worst ride quality I've ever felt in my life. I'm a used car dealer and I drove every type of 05-07 STS they sell prior to buying this one. MagneRide and Standard. All of which rode acceptable to me. Some better than others. I purchased this one, cheap, assuming the suspension was bad. 3 Cadillac dealers later, 2 independent shops later, all I've been told is my suspension is perfectly fine. As I said I'm a car dealer, and I drive more than my fair share of vehicles. Never in my life have I been in a car that rides so poorly. Even at 10mph, it absorbs no impact. Every bump shakes the entire vehicle. I feel no difference between Touring and Perf. modes. No leaks. No error codes.
    My questions are as follows. Does anyone else feel the same way about their STS? Is there some mysterious issue that can go un detected to cause this? Am I just SOL? If this is "Just how it rides." Which I truly just do not believe. If that is so, is it possible or feasible, to convert this car to a softer suspension, say base FE1/FE2, but using a simulator computer and base STS suspension setup, magnetic or not.
    I love everything about this car, minus the ride quality. I don't mind spending the dough to do the swap properly, if it's possible. As I said, I purchased this car at a steal of a price, from a man that just needed the cash.
    Any help is greatly appreciated. Thank you!
    Attachment 106324
    Did you ever try reducing tire pressure? The one I took off our lot rode hard as well, too stiff for my spine and ass.
    I lowered the tire pressure to 26.5 pounds. I then lowered it to 23 but feared I would damage a rim on the crappy Massachusetts secondary roads.
    Back up to 26.5 pounds now. It acceptable but I don't feel comfortable in it.

  9. #39
    GreyFox is offline Cadillac Owners Member
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    Karsntrux, did you ever resolve the problem? I have a 2008 STS4 N* with the 1SG magnetic ride and its ride is rougher than any early 1970s Corvette I ever drove. It sounds like you have the same issues. I have tracked down replacement shocks from Amazon at a little more than a quarter of the price that the local dealer wants, but I am not convinced that the problem is with the shocks. I don't think I get a floaty ride or a lot of bouncing. It's just that when you hit a bump it's like there is no suspension whatsoever. BANG!

    Interestingly enough, my wife drives a 2005 STS4 N* as well. Her ride is smooth as silk. I just went out to the garage, where both cars are parked, side by side. Just sitting there, the back end of her car sits a good inch or two higher than mine. To me, this does point a finger at the self leveling system (however both cars were not running, so there would have been no leveling activity on the part of either).

    How do you test the self leveling system? And more importantly, if it isn't working, how do you determine which part of it has failed?

  10. #40
    hiltonny is offline Cadillac Owners Fanatic
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    My 2008 AWD rides bad and the dealer told me it was a bad passenger rear shock which is the magnetic type, I ordered a new one for $331 from Rock Auto and plan to install it in a couple of weeks. I have a 2008 STS-V and that rides nice, they don't have the magnetic type suspension.

  11. #41
    blackonblacklac00's Avatar
    blackonblacklac00 is offline Cadillac Owners Enthusiast
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    Quote Originally Posted by GreyFox
    Karsntrux, did you ever resolve the problem? I have a 2008 STS4 N* with the 1SG magnetic ride and its ride is rougher than any early 1970s Corvette I ever drove. It sounds like you have the same issues. I have tracked down replacement shocks from Amazon at a little more than a quarter of the price that the local dealer wants, but I am not convinced that the problem is with the shocks. I don't think I get a floaty ride or a lot of bouncing. It's just that when you hit a bump it's like there is no suspension whatsoever. BANG! Interestingly enough, my wife drives a 2005 STS4 N* as well. Her ride is smooth as silk. I just went out to the garage, where both cars are parked, side by side. Just sitting there, the back end of her car sits a good inch or two higher than mine. To me, this does point a finger at the self leveling system (however both cars were not running, so there would have been no leveling activity on the part of either). How do you test the self leveling system? And more importantly, if it isn't working, how do you determine which part of it has failed?
    I just went through having to fix the back suspension on mine absorbers,springs,air lines,air compressor.

    First test option is start the car and within 30 seconds or so you should hear the air compressor kick on for a couple seconds from the rear passenger side wheel well.

    Second option open the trunk and have 2-3 people sit on the edge of the trunk and wait a couple seconds and listen for the compressor to kick on and the rear raise up.

    If you don't hear the compressor turn on at all then make sure you check ALL fuses in the fuse box under the rear seats on the driver side. Check the labelling on the fuse box cover. There's a black relay, pink 30A fuse and a 10amp fuse. Let me know how this test goes and we will go from there.
    RazorBacker1 likes this.

  12. #42
    GreyFox is offline Cadillac Owners Member
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    Thanks blackonblacklac00. I tried your Test Option 1, and I did hear the compressor kick on for a few seconds. It sounded like it was under and in front of the rear bumper. So, what's the next step?

  13. #43
    EChas3's Avatar
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    Check the hoses or shocks, I'd guess.

  14. #44
    blackonblacklac00's Avatar
    blackonblacklac00 is offline Cadillac Owners Enthusiast
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    Like Echase3 said, check the shock. Once the compressor puts air in the bladder of the shock it should become firm. Might be a bit hard to reach with the tire on but try to get your hand on the shock air bladder and see if it's firm. If not squeeze the bladder with your had and listen if you hear air coming out of it.

    Note one thing on my car that was wrong when I got it was the rear suspension was sagging like crazy. While I was waiting for the rear shock absorbers to come I installed the OEM spring brand new and that made the difference height all on its own. I wouldn't over look that either but I wouldn't be able to tell you how to determine if it's your springs because only reason I did mine were because it was obvious.

  15. #45
    ddalder's Avatar
    ddalder is offline Cadillac Owners Connoisseur
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    Re: 2007 Cadillac STS V8 WORST RIDE QUALITY! Help!

    The magnetic ride control shocks seem to be prone to completely seizing. This happened with my left rear and other members have reported this as well. Don't dismiss the fact that this might be a bad shock. My car rode like there was no suspension at all until I replaced the shock. It is extremely unlikely that a bad air ride system will cause such a harsh ride that it's described as the car having square wheels. Air is very compressible and there is definitely some flexibility to the wall of the bladder. These properties don't lend to the symptoms described.

    http://www.cadillacforums.com/forums...n-problem.html

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