Okay, the guys at the garage are stumped with this one. When I'm driving my 1989 200 turbo on the highway on a warm day (doesn't do this when it's cold) it will start shaking. It starts out minor and then increases in severity until the steering wheel is shaking so badly the whole car shakes and rattles and I have to pull over. This is accompanied by the brake pedal losing it's power assist and a decrease in engine power which we now know is due to the fact that the brakes are on when this happens.
I keep driving at a slower speed and eventually it stops and drives normally. It can come back during the drive but not always.
It has been at the shop 4 times for this and they don't know what to do. The last time it was there it was still behaving this way when I got it there and the front brakes were engaged, the rotors were hot and smoking. They've tried everything including cleaning up the calipers (the car was stored for a number of years and has less than 100,000 miles on it), flushing the hydralic sustem, flushing the brake system, twice, as there was still some contamination in the fluid. The master cylinder has been inspected and the seals have been checked. They can find nothing wrong. The bomb is fine, also. One mechanic figures he's worked on about 5,000 Audis over the years and he's never heard of this.
Am I the only Audi owner this has ever happened to? Any ideas? Please help.
I keep driving at a slower speed and eventually it stops and drives normally. It can come back during the drive but not always.
It has been at the shop 4 times for this and they don't know what to do. The last time it was there it was still behaving this way when I got it there and the front brakes were engaged, the rotors were hot and smoking. They've tried everything including cleaning up the calipers (the car was stored for a number of years and has less than 100,000 miles on it), flushing the hydralic sustem, flushing the brake system, twice, as there was still some contamination in the fluid. The master cylinder has been inspected and the seals have been checked. They can find nothing wrong. The bomb is fine, also. One mechanic figures he's worked on about 5,000 Audis over the years and he's never heard of this.
Am I the only Audi owner this has ever happened to? Any ideas? Please help.