Today I changed the maff , no change.

I have found a split in a vac pipe though, its the one between the maff and the turbo (has a beather going upto the oil filler cap on the rocker cover) the split is at the joint between the large pipe and the breather just before the turbo.

I also have a fault code now that didnt show up before,

17958 - charge presure: control deviation
P1550 - 35 - 00 - -