audi 80/90 type 89 b3 starts and goes out, after cleaning attempt no more or very creepy

Hello, I have the following problem with my car, It’s always been that he ran extremely undertoury when he is cold and very rarely he went out even while Der driving out when he was warm, but jumped immediately and flawlessly again. After I changed the ignition candles this problem improved a little. Now, however, it was so that he jumps and runs out without gas immediately. With gas I could keep him alive, But he banged in the engine room, near The injection system.. The speed always danced between 500…so shortly before going out and 2000. I thought that was the lot divider and built it up and cleaned it…..this pen now pulls itself in and out all by itself…I think That’s so normal now?.. anyway it’s so that he doesn’t jump at all….once he didn’t do it anymore….now no more…who has no idea What this could be? Thanks already for your ideas.