Omega B 2.0 bubbles uniformly from air filter box/no power

Hello together, yesterday my wife came home with our Omega B and said that the cave would only jerk and not pull any more. Motor control light doesn’t burn, but motor has an even, speed-independent bubbling (no water bubbles) I then put away the air filter box and there the bubbling really becomes a rat. But as I said, absolutely even, no matter how much gas I give. He shot then also once, takes bad gas and starts running The idle is relatively even with short dropouts. What does my grandmother have now again? Motor is the 2.0 16V from 1995 Greeting Markus