Toomastom

The engine is 1.8 TSI, 118 kw, gasoline. The outside temperature does not play a role, but the peculiar thing is that in warm, windless weather, the start is fine. If it is windy, the cold start does not work smoothly. If the start is normal, the engine revolutions are 1200 rpm /m. If for the first 20 seconds the engine idles, then the tachometer shows 1000 rpm. In winter, a cold start is never proper. A warm or lukewarm engine starts normally.

When starting from cold, the idle is very uneven for the first 20 seconds. The engine even wants to die. If you increase the revs a little, the cylinders work quite evenly. After the first 20 seconds, the problem disappears and the engine runs well. I tried a different MAF sensor but it didn't change anything.