audi a6 c5 allroad - the suspension compressor turns on after exceeding 50 km

Hello, I changed the compressor today in an allroad 2.7 t 2003. The car lifts and descends according to the set height, stands evenly. After lifting, the compressor turns off and the car keeps its altitude, but a strange thing, after exceeding 50 km, the compressor turns on and only turns off when I slow down to 20 km. I was driving a few kilometers at a speed of 45 km and it did not start, the car does not go down. Where to look for the problem? Or maybe some adaptations need to be made? The car came with a completely broken compressor and it kept pumping (until the computer disconnected and crashed) and the owner just bought the car and does not know if it was so before. I deleted the errors and now it does not display anything. And the compressor over 50 works continuously. Anyone with something like this? Thanks a lot for the hints.

If you have installed a poor quality compressor, it is possible that the pressure that is accumulated in the tank is too low, it is enough to lift the car but the driver sees that it is low and tries to fill it. Do not ask me why it manifests itself at 50 km / h but in my case the replacement of the compressor with another one helped.

The compressor is almost new. It pumps very well from 0 full soil to 4 lifts quickly and easily. I do not rule out such a possibility, but before I pick it up again, I would like to make sure. I did not check with what pressure it was blowing, but during the dry test on the table I could not hold the exit with my finger. I installed many times weaker and there was no such phenomenon.

Mine was also new from the box and it gave such symptoms it pumped up the car nicely, but it turned out that above 8 bar it died

The air distributor was damaged. After replacement, it still turns on at 50 but pumps up to 16 bar and turns off. Now, when it collects air, it raises the car from 1 to 3 without starting the compressor.

Hello,

I have exactly the same problem. I lost one compressor and now I have a new one, but when driving with vcds, I see that the car starts the compressor at a speed of 50 km / h and pumps without hesitation, bringing the compressor temperature to over 100 degrees. However, if I only slow down slightly below 30 km / h, the compressor automatically stops and there is no pumping ...

How to check if a splitter is damaged?
Can this effect of 50-30 km / h be changed somehow?

I am asking for help because I am losing my strength for this devilish mechanism which is air suspention

Nothing can be changed. At least I failed. If the compressor is definitely there
operational, then spray the separator (liquid soap) with a tester and I will show you the leak. Good luck. Before I found the problem, I searched all the car bellows, connections, tank. There is some of it

For posterity.

If we do not lift the car .. look, we do not force the compressor to work then:

As a standard, the compressor starts at a speed of 50 km / h when the equalizing pressure tank does not have the required pressure level. After switching on above 50 km / h, the compressor works until the tank reaches the required pressure.
At speeds below 30 km / h, the compressor stops pumping - regardless of the pressure in the expansion tank.

Of course, I do not need to explain that the expansion tank supports the lifting of the car. When there is pressure in the tank, the car will raise much faster.

This behavior of the system is clever because at speeds above 50 km / h, the compressor has better cooling and, if I know well, it works better in the electrical network.

...

Therefore, any leakage in the system will lead to a longer operation of the compressor which will try to replenish the pressure in the expansion tank.
Also, if we have less compression in the compressor (sand scratches on the head, leaky rings, etc.), it will be extremely difficult for the compressor to pump up the pressure in the expansion tank. The compressor will work for a long time and will heat up .. / overheat and it will fall sooner or later ..

So. If you want to get into trouble with your head. Check the bellows. Check pressure cable connections on relay, bellows, expansion tank and compressor. Check the condition of the air filter for the compressor !!!

My way to check the bellows. I put the car in the garage for 3-5 days and pump to level 2 or 3 alternately. I detach the battery, measure the distance from the floor to the edge of the fender and wait ...

Greetings!
Danny

My dear...

I'll refresh the topic because I need help.

How to connect the suspension compressor to the table to check its functioning? I am asking about the electronic layer.
There are three plugs .. One from the power supply, one probably from the control module gives the pressure and one is the compressor thermometer.

I am asking because after buying a regenerated one, I was killed and I want to test it a little.

I will describe the conclusions later here.

BTW.
The error that accompanied me throughout the use of the car:
01772 - Signal From Level Control Presure Sensor (G291)
27-10 Implausible Signal - Intermittent
disappeared after replacing the compressor ..

Thanks in advance for helping to hook up the compressor on the table

Danny