can anyone tell me why when fitting a bleed valve i cannot turn my boost above 15 psi had a superchip fitted and when i go to turn up the the boost it only goes to 15 psi where as it should go to about 17 18 to a safe point but will noy go any higher will boost up if dissconnect bleed valve but valve is open to the highest point then stuck at 15 any one help with this

 

IMO bin the bleed valve and get a digital controller.