Thanks For the advice Steve.

I always thought that the car was extremely slow before I fitted the box, so like you said, there could be an underlying problem...

I have tried adjusting the screw on the box, but it dosen't make a difference to the problem, which either way I turn it!!!

Bearing in mind the car has done such a low mileage, would the MAF really be playing up??

Anyway, I know someone who has access to a VAGCOM system, so I will get the car checked over. Does the MAF always show up if there is a fault, or is it something that does not always show up...