Space Runner 2.0 ltr., 100 kW, year of construction 00. I had the timing belts changed in a free workshop, the engine then ran quite normal. After approx. 5 km the problems, no more power, ringing strangely, idle speed only approx. 600 – 700. I then switched off the engine and restarted – again everything top. After approx. 10 km the same problem again. Does anyone know what this can be????