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.

 

 

Question, is your ride bumpy or bouncy?

 

Does the current XJ still have CATS ? When there are any faults recorded that could affect handling or braking, CATS will default to 'Hard' thus giving a harder ride than normal.

 

 

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.

 

 

You do not need to be driving fast. I did it @35mph within my lane on a local street outside my neighborhood

 

CATS is an adaptive suspension. Computer Active Technology Suspension.
Not sure if they still call it that on the current XJ or not?
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Tried the race-car maneuver, but the bumpiness remains. So I think I'll take it back to the wheel repair shop to make sure the wheels are properly balanced and circular. Perhaps I will need to entertain the idea of downgrading my rim size if the bumpiness persists.

 

This post is edited
I must have accidentally posted somehow.
This was the equivalent of a but dial only it was a post here.

 

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.

 

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.

 

Well I now have 4 Wheels sitting in storage for the same reason they’re bent. I got new aftermarket ones installed. Jaguar uses cheap metals and their wheels suck.

 

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.

 

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

 

I think it depends on what wheels you have?
I have 20" forged alloys (Farallon) on my XJR and never had any bending or cracking despite hitting several pretty big pot holes and all the normal road hazards.
I don't think the other 20" rims are forged?
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Thanks for that info. Can you please post a picture of your rims? Thanks

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.