2.0 16V F4R engine has no power and the crusher glows

Hello municipality, the Laggi is a real long-distance car and so far I drove perfectly. Now I start, drive normally and after about 1km the engine has no more power. The idle runs down to 400 and it sounds very dull and hollow. I turn and drive back home, altogether about 4km. The Laggi squirts now also out of the bonnet. At 50km/h the current consumption is at 22-25 Ltr./100km. In the garage I leave the smoke out of the engine compartment and see that the cracker at least The electrodes of the candles are black. Does the brown edge have something to say? From 1 to 4 it is getting weaker and weaker. Otherwise the electrodes are black. Now obviously my compression meter no longer works, although only used two times in total. On all cylinders it measures 3 bar. Now I compared with the Twingo and also here this 3 bar. And the Twingo runs great! In 9/2016 I changed the cat and since then e inen 99-EUR-Kat inside. ? But something still arrives at the exhaust. Does anyone have an idea about this?