Hi, my stepdads father has a 1.8 A4 on an 's' plate, Problem hes having is it cuts out when he stops, As the revs drop they dont stop and kills the engine, Only does this when its hot though. Starts and drives fine. No lights on dash. Any Ideas from anyone who's suffered from this? I haven't looked at it yet, just wanted to see if anyone has an easy fix before i pull it apart?