Got my Audi Avant 1.8t remapped at A for Audi in Clydebank a couple of weeks ago. Mine's the 150bhp sport quattro so the difference was something else. However after a couple of weeks and for no apparant reason I seemed to be getting a drop in power in the bottom end. Another visit to A for A yesterday resulted in Andy finding a mass flow meter fault. Replaced this and fault still there. They traced it to a faulty diverter valve and replaced this and got rid of the fault. Last thing they said after a test drive was that although the faults now gone the car is detonating like **** and what octane fuel do I use in it ? Where I stay I'm a bit limited for choice so I use Esso Supreme 97 octane. Anybody got any thoughts on this as I'm now concerned that my engine may go into meltdown, pistons etc. I think I may have to reverse the remap to preserve the engine! 
