I have a Greddy prof-b spec 2 on my car and i have the same setting i have always had with no problems.Well now out of no where i can go over 11 psi on the low setting, so i put the same setting from my high in to the low setting and same thing. But those same number on my high setting let me boost at 19. it is possible that the low setting to the controler has stopped working?