i bought an air dog 2 165 a couple months ago and installed it with out a pressure guage. Well i installed a issopro fuel pressure gauge and tryed to adjust the pressure up to 35psi. well it wont go past 28psi. that is the adjustment screw all the way in. i can adjust down from 28 psi but not up past that. WHat am i missing i thought i would at least be able to adjust it up to 35psi? any input? what do i need to do to get the pressure up? spring replacment? or what? thank you. I will be calling after the holidays once you guys open again but figured you might look here first.... Thank you much and Merry Christmas!