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#67 of 463 Re: 2003 Park Avenue Ultra with bad vibration at highway speeds [pau03]
Jul 25, 2007 (3:37 pm)
Are the 17 inch rims factory quality rims? If not, they may be contributing.
You are on the right track, in my opinion, with the change in temperature observation. The tire pressures change with ambient temperature and with the medium (tire) temperature which changed the internal air pressure as well as the behavior of the rubber portion.
Go to this page and read about road force balancing.
It will explain that while a wheel and tire may be balanced off the car, when it's rolling with weight on the tire the crush amount of the tire varies. That causes the wheel to move up and down and you reach a speed where it begins to resonate with the previous bounce force and increases.
You may have a rim which tests as off round and a tire may be imperfect. Sometimes a knowledgeable tech on the Hunter 9700 will move the tire relative to the rim so the forces cancel each other out. The problem here is something many companies have had, not just GM. GM may have been early with the Aurora chassis and its stiffness. When you have very light components, like A-arms, they rreact more to up and down motion from the wheels rolling. The stiffness of the frame (unibody) transmits this.
The solution was to have Michelin tires because they are the best made for uniformity. Many manufacturers are way behind the quality standard needed by today's cars. Then find a dealer of Buicks or Cadillacs because they have worked with this problem. Find one where the people seem interested in finding your problem and fixing it. It may cost more but be less trouble than working with low Joe at the local discount tire store who bought a Hunter 9700 as a profit center. Be aware some tires were replaced on Park Avenues with Michelins as I recall to try to troubleshoot the problems. I bought an 03 LeSabre with Michelins because it was essentially the same car as the STS with Michelins at the time (there are differences in quality, I know).
The alignment is also a factor. My service manager started life as the alignment person, so he knows alignment. He tweaked the alignment on the 2nd visit for some road feel vibration. I told him on long upslopes on smooth fresh asphalt on interstate it would begin to vibrate but at the same speeds with no pull on the wheels nothing happened. The slight pull changes the front wheel positions and alignment.
Found the Rear toein was off. Set fronts at perfect setting--not just within specs. It has to be at the optimum. And the vibration from the Symmetrys was gone. As the tires aged after 15000 they seemed to become more even. I suspect the belts change with age and flexing those miles.
There's a search page on the hunter page that will help you find all the local stores who have Hunter 9700s.
Good luck. I don't know about the quality of Khumhos that you have. I know the Goodyears are not up to snuff at the time in 03 when my service manager was fixing mine. I beleive that's what was on some Park Aves originally.
#68 of 463 Re: 2003 Park Avenue Ultra with bad vibration at highway speeds [imidazol97]
Jul 26, 2007 (3:29 pm)
Thanks for the detailed reply. The Kumho's were fairly inexpensive and they got fairly decent reviews from most people. There were a few complaints about flat spotting and I do get that problem too. Even when the balance seemed OK I still had to drive about 10 miles on the highway before the bad shake went away.
I think I'll give the road force balance a try. It just seems kind of expensive to have to pay $60 to get 4 wheels balanced. But if it solves the problem it will be worth it.
#69 of 463 Back again
Jul 27, 2007 (5:32 am)
A few weeks ago, I reported the my son's park avenue would cut off after reaching running temp. By using the spare key it ran fine until now, I has died twice, which is still alot better than dying every 30 min. Can the coolant sensor cause the car to shut off? It will shut down just as if your turned the car off. Sometime start right away, other time must let it set for 10 min. I know we need to look into the crank sensor and the computer next, but here are some other issues, the radio has never worked and the trunk release latch will not close the trunk lid properly. I adjusted the latch by hand and the switch does have power (trunk release works fine). Also, the power seat and side mirrors work and then sometime decided not to work (they stop working when we had to repair the rear view mirror and disconnected the wires running to the rear view mirror). The car seems to run fine with the A/C on full blast which I believe turns on the electric fans, but again it's starting to die. When we were using the old key, the fans never came on, which I think caused the heat problem. I am shooting from the hip, but I just trying to list all problems, there may be a relationhship. Any comments will be great. Next stop may be the Buick dealership at $90.00 an hour.
#70 of 463 97 Park Avenue Ultra Driver window doesn't work help!
Jul 31, 2007 (1:49 pm)
I have a 97 Park Ave Ultra and the only power window that doesn't work is the drivers side front window. I have replaced the motor, the switches and now tried the driver door module which is a major expense and still not fixed. All the other windows work and the mirrors,door locks all work. Anyone have any idea what to try next?? I'm getting desperate as it is very inconvenient not to be able to put down the drivers window.
I appreciate any suggestions.
Aug 04, 2007 (3:21 am)
1991 buick park avenue 3.8 v6 engine will not start why?
#72 of 463 Re: Buick Park Avenue '97 Check Engine Light -- transmission problem [ernst
Aug 04, 2007 (5:45 am)
My best bet for you would be a bad oxygen sensor.
#73 of 463 Re: email@example.com [cpenney]
Aug 08, 2007 (1:09 pm)
Hey I have the same problem..... Can someone please advise on what to do. We have checked everything!!!!!
#74 of 463 Re: 97 Park Avenue Ultra Driver window doesn't work help! [bev7]
Aug 08, 2007 (5:43 pm)
First of all who is doing your work? It sounds like someone is just being a parts changer. You are going to need someone with electrical knowledge. I happen to be an electrical engineer that worked for GM when I came out of college. Imagine the luck! Anyway, I have a service DVD that contains some 97 PA info but no schematics or windows info. The DVD does have the full 98 PA info. Based on Edmunds info it appears that these cars are basically the same. I'd be willing to try to help but you'll need someone to be my eyes for me. The first place I'll suggest to look is in the wiring harnesses and connectors. Hopefully you'll read this. It sounds like a fun one. If you want to you can publish your email address and I can send some schematics. Set up a temporary hotmail address if you don't want to publish your real email.
#75 of 463 1991 Park Ave. Ultra Help list.
Aug 11, 2007 (11:31 pm)
Hello, I recently came into owning a 1991 PA Ultra, the problem is I do not know the repair history.
My mechanic said it needs a new rear engine mount, and today when I shifted into reverse it rolled forward, not engaging until I went back to park, then to reverse, are these/could these things be related?
Also the check engine light is on solid, I have read in earlier posts that this is a non-critical light since it is not flashing. My mechanic told me when I come back to have it smogged he will "talk" to the computer.
One last thing is I need a new driver seat-belt buckle (I currently have to pull it over to the passenger buckle). I intend to go to my local pick-your-part for a replacement, and I know that GM cars share common parts, does anyone know if there is a compatible buckle from say an Olds 98 or Pontiac something?
I thank you in advance for any help or guidance,
#76 of 463 blinking or absent dashboard lights
Aug 19, 2007 (5:01 am)
My 99 Park Ave with 103k miles has a problem with the dashboard lights. The digital displays for the odometer, fuel use, etc and the gear indicator sometimes work fine, sometimes Nothing at all is lit, sometimes lit but the odometer, etc, doesn't change while driving, sometimes the gear indicator lights blink like a pinball machine! Occasionally it will return to normal after restarting the car, or in the middle of a trip.
Is it a loose connection or part that's faulty??
Many thanks for suggestions.