Should'nt happen with a PMI air system but worth a try when you turn the air on do you screw the oops knob all the way in if so try backing it out half a turn and try the marker. Also check that the LPR screw is flush and also check that the inline reg adjuster is set correctly. To do this degas the marker and with a 1/8 allen key turn the adjuster all the way out at this point the adjuster should be right out of the bottom of the reg then turn the adjuster back in 5 turns this should give you about 280fps. If that does'nt work let me know.