ok to update this got the new valve today fitted and checked all hoses everything looks ok no signs of splits or cracks took a short drive and still only seams to boost to 1.2 bar max and holding 1.1 bar
could it possibly be the way the car has been mapped as i dont get a sudden burst of boost more of a constant power delivery???
I'd take it back to who mapped it and ask them, Does it feel weaker than when you first had it mapped ???