Hello all, I have now converted my 1.6er to Weber double carburetor. If the engine is completely cold, it runs at idle to approx. 900 to 1000 rpm, now I have it run in idle until the fan turns on. After turning off and restarting the engine, the engine turns at once to approx. 4500 rpm in idle! What can that be? Have already looked a lot but found nothing yet about what that could be! Thanks and mfg de Olli