ok heres the problem i have a 91 integra with a 99 si b16a2 ,im running in obd2 .When i connect the hose from my fuel pressure regulator to the intake manifold my car jus dies out but when i take it off ,the car idles fine.ive also noticed i get horrible gas milaege, another side note when i hold the throttle steaddy between 1500-3000 the rpm needle bounces all over the place. i cant seem to figure out what is causing this ,anyone ever had a smiliar problem ?