Moin! I’ve spent the last few days looking for problems like mine, but I didn’t really find descriptions that help me…short story ahead: A few days ago I made a round trip in my 93 Opel Calibra 8v 85kw. After some time I noticed that he was e.g. at red lights, so generally in idle time starts to run more restless and to tuck, like a trecker. But I didn’t think about it yet, because it was quite discreet and also seemed to have gotten better. Then it came again and became worse. A little later I noticed that the tuckering didn’t go away even when speeding up. Finally it was so bad that I had to stop at a bus stop. Then I realized that the engine only runs on 3 cylinders after all. But then I was still smiling home, was not far away. Since then it is there and doesn’t want to run on all fours… sparking comes on all the candles strongly. But I can’t remember the fourth thing about pre-compressioning. I can’t just say that I can’t have a candlestick.