Bumpy ride
#1
Bumpy ride
Hi all,
My ride quality is pretty bumpy at the moment. Trying to figure out the cause. I took it to a tire shop and had two of my rims restraightened and two tires replaced. Still bumpy.
I have some to-do items in my que including supercharger isolator spring service and addressing a brake booster/ vacuum pump issue, but I can’t see how that would be related to my ride quality. I think it may have started after I disconnected and reconnected the battery to reset my EPB. But not really sure.
My indie confirmed my air suspension is working fine. Thinking the adaptive suspension module may need resetting (if that is even a thing), but that is a wild guess. Any thoughts? Thanks.
BTW I only have a Blue Driver OBDII reader. Not sure which reader would list suspension issues.
My ride quality is pretty bumpy at the moment. Trying to figure out the cause. I took it to a tire shop and had two of my rims restraightened and two tires replaced. Still bumpy.
I have some to-do items in my que including supercharger isolator spring service and addressing a brake booster/ vacuum pump issue, but I can’t see how that would be related to my ride quality. I think it may have started after I disconnected and reconnected the battery to reset my EPB. But not really sure.
My indie confirmed my air suspension is working fine. Thinking the adaptive suspension module may need resetting (if that is even a thing), but that is a wild guess. Any thoughts? Thanks.
BTW I only have a Blue Driver OBDII reader. Not sure which reader would list suspension issues.
#2
Join Date: May 2008
Location: Great Mills, MD
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Nedoerr, what size rim are you running? In addition, what pressure are you running in your tires? The larger the rim you are running, the less the tire can flex to absorb the imperfections in the road and therefore results in more bumps inside the cabin. The same is true for running higher pressures in the tires. The higher the pressure, the less the tire can flex. Most people find that keeping the tires at say 38 psi front/35 psi rear is a pretty good spot to sit to keep the tire at a high enough pressure to get good tire wear but be soft enough for a nice ride.
I have noticed that sometimes I will get a suspension worning if I start the car when it is parked on an uneven surface. This will force the car into dynamic mode and stiffen up the suspension. Grnated, I normally get a light on the dash when this happens.
I have noticed that sometimes I will get a suspension worning if I start the car when it is parked on an uneven surface. This will force the car into dynamic mode and stiffen up the suspension. Grnated, I normally get a light on the dash when this happens.
#3
Thanks for the reply. I have the 20” stock rims with the 380mm brakes in the front. I inflate to 32 PSI, as indicated on my door frame. I haven’t changed the rear tires yet, so that remains a possibility.
Not sure how much bumpiness is normal, but it feels more than I expect. Don’t remember it being this bumpy when I first bought it. No warning lights illuminate.
If tires and rims are the most likely, I could take them back in to make sure they were straightened properly the first time.
Not sure how much bumpiness is normal, but it feels more than I expect. Don’t remember it being this bumpy when I first bought it. No warning lights illuminate.
If tires and rims are the most likely, I could take them back in to make sure they were straightened properly the first time.
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#7
Join Date: Jan 2012
Location: Reynolds Lake Oconee, GA USA
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OK, so this may sound weird, but had the same issue once after a car wash. It fixed itself after I did the same maneuver that race car drivers do to heat up their tires by turning the steering wheel abruptly left and right and swerving the car, but in a tight line. This rocked the car and after that the suspension "softened up". Call me crazy but it worked for me.
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#8
OK, so this may sound weird, but had the same issue once after a car wash. It fixed itself after I did the same maneuver that race car drivers do to heat up their tires by turning the steering wheel abruptly left and right and swerving the car, but in a tight line. This rocked the car and after that the suspension "softened up". Call me crazy but it worked for me.
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I would get the wheels balanced on a Roadforce balancer. This actually measures runout under a simulated load, so is much better for detecting and compensating for wheels and tires that are out of round.
What kind of tires do you have? My experience with Pirelli P Zero All Seasons was terrible. Chronic balance issues that could never be totally fixed, and terrible for flat spotting when parked. The Dunlops on my new XJL also will flat spot, typically takes 5-10 miles on the highway to totally settle down.
What kind of tires do you have? My experience with Pirelli P Zero All Seasons was terrible. Chronic balance issues that could never be totally fixed, and terrible for flat spotting when parked. The Dunlops on my new XJL also will flat spot, typically takes 5-10 miles on the highway to totally settle down.
Last edited by Mark SF; 06-26-2019 at 09:31 AM.
#15
So it turns out I had another damaged rim (two cracks in the rear drivers side). Repaired it and now the car is much better. These rims are pretty pathetic IMHO.
Still would like to do a little more suspension work to get i”everything perfect. But I’m going to stay focused on the powertrain for now. Maybe next year I’ll revisit the suspension.
Thanks everyone.
Still would like to do a little more suspension work to get i”everything perfect. But I’m going to stay focused on the powertrain for now. Maybe next year I’ll revisit the suspension.
Thanks everyone.
#16
So it turns out I had another damaged rim (two cracks in the rear drivers side). Repaired it and now the car is much better. These rims are pretty pathetic IMHO.
Still would like to do a little more suspension work to get i”everything perfect. But I’m going to stay focused on the powertrain for now. Maybe next year I’ll revisit the suspension.
Thanks everyone.
Still would like to do a little more suspension work to get i”everything perfect. But I’m going to stay focused on the powertrain for now. Maybe next year I’ll revisit the suspension.
Thanks everyone.
#17
So far we might have established that Jaguar wheels can be damaged, what has not been established is that aftermarket ones cannot be damaged. So your statement might be a tad hasty.
#18
Sorry, i didn’t mean to intend my statement in that way. And of course, I’m pretty sure all wheels can be damaged, but what I meant was that Jaguar wheels can be bent/damaged much easier than others. The aftermarket wheels I got are flow formed so they are a bit more durable than OEM. On my 09 XF SC the wheels are bent on it as well, but not my Porsche Cayenne that has a 21 inch rim. I should’ve been clear sorry
#20
I understand the 19” rims are also pretty resistant to bending. Maybe others with 19” rims can comment on this. Really all 20” rims should have been forged or something to prevent easy bending. It’s understandable to not do this on the 19” rims because they have more tire to absorb the road.