Re: Have I got a problem.....?
OK, another quick update. I've ordered a new MAF (mainly cos a certain place have them on special at the moment). My performance problems appear to be related to the prevailing weather. For instance, when getting in and driving first thing in the morning (about 16C outside) the performance is fine, but coming home again (about 23C) it starts to get juddery and breathless. To further cap it off, coming home in the rain last night (so damp,cool air) she went like a rocket.
All this points (in my limited car-type technical knowledge) to the ECU not measuring the density of the air correctly, hence the MAF.
I'll put it on when it comes in and let you know.