Hi Hab an urgent problem with the 1991 Audi 80 B4 2.0 carburetor from my best friend. And that is that the car ran quite normal yesterday morning. Did drive away this evening and had the following problem since then: The engine runs extremely unevenly in idle mode, runs briefly with increased speed, then falls off until it almost runs out, then speed goes up again and is slightly increased, then falls down again so extremely.. The whole as a change of about 3-5 seconds. he on his own if you don’t drive with a lot of gas and little clutch. Did then look at home and I noticed a few things that might be important: 1. I pulled the gas train out of the suspended, slightly pulled on it, was not withdrawn by itself again, had to push it slightly again, so that it is “wrapped up” again. So goes in the hose in which it runs relatively hard. 2. The throttle valve at the top of the carburettor does not close correctly, right and left is jew The carburettor is sitting virtually in the air filter unit and of 4 plastic flaps from the air filter unit 3 are broken off, so you could swing the air filter with the carburettor back and forth. Have now built a sheet metal tab, so that the carburettor and air filter sit again quite firmly. But I’m not sure, can be good, that it still draws false air… Maybe something of this is of importance I’m sorry, the problems could not be solved now. he describe, have no Audi and no carburetor, am not a car mechanic and now also quite done with the nerves. Would be very grateful if someone knew what I wanted to say and could help me (us)…