I just read in a previous article that you can learn the ECU by jamming the battery for 10 minutes (in case of a warm engine) and then it would re-learn again? http://www.motor-talk.de/…/…e-be-bei-der-gasannahme-t4951321.html?… Have the feeling that he has lost some power since the last tank filling (possibly bad fuel) Or helps here a new learning. Runs exactly 100 and no longer about 109 bin for tips.