Hey guys i set my fuel pressure the other day, my gauge isnt the clearest but i know it was somewhere in the 43-45 range. Anyways car was running pretty good. Well i take it out today and now under higher boost the car slutters, and wants to backfire. Long story short i wanted to cut down the FP just a tad, but now when i have the car idle'ing i take the vaccum line off and cap the line. The car will only run a few seconds before its starts to jump around getting lower and lower in rpms until it dies. I cannot set my FP, is there another problem? Thanks