thanks for looking, i have had great advice from you lot before, and really need some more please!

my friend has an st on an 07 plate, and had a strange prob, first thing is the car has hardly any boost in low gears, but some more in the higher one's,

now this is the weired bit there is a whining coming from the turbo on tick over, but if you pull up the dip stick a tad it stops????? any clues with this would be great as my mate cant really use the car and cant spare any more cash at fords!!!!

anyone else had a simler prob??

thanks in advance people