Hello, we need your help. I bought my son (15) a used Speedfihgt 3 LC. On purchase he was throttled to 45, but actually ran GPS at the end of 50, TAcho 62. There were 2 throttles, one for the Variomatic and one ring as limiter for the gas train. Also in the TüV report. Lt. previous owner he ran with it 38 whether GPS or Tacho I don’t know. My son has now only installed the throttle of the Variomatic, not the one for the gas train and drives since then (200 km) (I don’t think it’s okay in general, the 2nd throttle is now also installed) That’s how the part GPS 40, TAcho 42 ran. At the beginning everything seemed to be fine, but now there are problems. Yesterday he came back from driving and said that the engine had become hot and the warning signal in the cokpit had flashed. He would have stopped the engine immediately, waited and let it get cold. At home (about 5 km) there were no problems. I then looked for the cooling water and it was missing c a 0.5 liters. I replenished them and checked on the pump whether the cooling water is pumped. Everything looks good as well. Since then, however, the engine has small/short ignition oscillations at irregular intervals. Especially in the range 7900-8000 rpm. Is there a connection with the non-installed throttle (ring on the gas train), or is it generally a CDI / electrical problem? It is with already something that I have shuddered at 2 clocks… 🙂