Vibration Problem Query
03-14-2009, 04:04 PM
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Vibration Problem Query
I picked up my car today from Toronto Airport and set off down the 401. When I accelerated hard to pass someone the check engine light came on and stayed on. The exact same thing happenned at Christmas, but at that time the check engine light went off after a few days and before I had a chance to scan for codes. Today I had an additional very unwelcomed complication. As I neared Windsor Ontario I decided to accelerate hard again a couple times in order to see if I might clear the problem. I had the cruise control on at the time. As the car decelerated back down to the cruising speed it started to shudder. At first I thought it was the pavement. It was a fairly violent shuddering. I had to feather the accelerator to keep it out of this shuddering mode for the remaining five miles or so to my destination. I could get rid of the problem temporarily by putting the transmission in third gear and thereby getting the revs up. Any ideas fellows? I won't be able to scan for codes until Monday. (Note: I could not search the forum as the search function appears not to...)
03-14-2009, 06:42 PM
#2
Check you tyres too
<center><img src="http://pictureposter.audiworld.com/134419/dsc00301.jpg"></center><p>
If you were speeding a lot on old tyres, which are not rated for high speed, and / or the weight of the D2 you may have gotten one of those sidewall bubbles. Also remember that tyres have expiration date.
And isn't this picture yours? What can you expect when you treat the A8 as a dozer? LOL
If you were speeding a lot on old tyres, which are not rated for high speed, and / or the weight of the D2 you may have gotten one of those sidewall bubbles. Also remember that tyres have expiration date.
And isn't this picture yours? What can you expect when you treat the A8 as a dozer? LOL
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03-15-2009, 02:44 PM
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Could be a rim which got bend. The tires might be fine but if the alu wheel is deformed, it will
cause a vibration under certain conditions like braking or just releasing the accel.pedal and coasting along.
The misery is that it's hard to reproduce.
I had a problem similar to yours and it turned out to be a front wheel being slightly bend on the inside. The tire, being made of a softer compoung will "fill up the dent" so it's hard to spot.
Put all four wheels on a wheel-balancer and take a very close look on how the rim and the tire run. Look for signs of a wobble somewhere etc.
This is a good and most of all cheap way to start trouble-shooting.
The misery is that it's hard to reproduce.
I had a problem similar to yours and it turned out to be a front wheel being slightly bend on the inside. The tire, being made of a softer compoung will "fill up the dent" so it's hard to spot.
Put all four wheels on a wheel-balancer and take a very close look on how the rim and the tire run. Look for signs of a wobble somewhere etc.
This is a good and most of all cheap way to start trouble-shooting.