The only logical explanation I can think of would be that it puts a large load on the alternator, so the ECU adjusts fueling to suit, yet when you turn them all off, then you have the extra fueling thus more power. However the KAM would readjust within a few miles so seems a bit pointless to me!
A bit like a load of biffs on the STOC always pull the fuse for the KAM after they have been driving slowly so it resets it. Yet it adjusts itself within a few miles according to your driving style so seems a bit odd as to why you would bother!
Last edited by RichieST; 14-09-2010 at 06:41 PM.