My brother loves my car so much he has gone out and got himself a s2 erst.However his isnt standard and has got receipts for alot of uprated parts (forged pistons,grs intercooler etc,chip etc - how jealous am i!). However when he got it the guy said that he had turned the boost down to 8-9psi using a bleed valve but he did say it was tuned for 17psi.My bro wants to turn it up a bit (think he said about 14psi) and as it was tuned at 17psi he thinks it should be ok.However the bleed valve he has got has got 3 connections. One on the bottom that has a bolt in it blocking it lhs one to wastegate and the the rhs to turbo.But no matter how much we turn the valve either way the boost wont rise above 9psi.We can turn the boost down but it wont go higher than 9psi.
What can be the prob?