[gelöst]Motorstörung EGR, EVAP, Saugrohrumschaltung

Battery reset done. No difference. Strange thing is that it always runs fine when warm. No hesitation, no knocking, no power loss etc. I have made a few test recently with different mixtures; it is only 'pure' e85 that is causing the issues. Mixing just like 10% petrol in it and its all fine. Also strange is that it is not always having bad starts, maybe just 1 of 3, or 1 of 2. Last times I have filled up I have also been very careful about giving it time to adapt. Could my ecu or something be senile/dement, not remembering the fuel from last time?