Hi Andy
TDI cant see it being timing or compression because it would not go from no power to full by switching ign off n on immediatly
as I have said when mines going ok, ITS GOING!! 130mph!
Dont think mine has anything like that power but the part that concerns me the most,for now apart from the going into limp mode, is the vibration/rumbling engine noise as speed increases UNDER LOAD. IT does not do this when stationary or under no load.