im running the DSM 450cc injectors on my JDM h22a with a chipped p28. when i first got the ecu and the injectors in, the car would start but wouldnt run. i would stay on for 3 seconds then shut off. i then bought a fuel pressure regulator and gauge and up the stock 40psi to 50psi and i got the car to start and run but when i stepped on the gas the engine bogged and shut off. i upped the fuel pressure to 65 psi and the car ran and stayed on and thats what ive had it at since. my air/ fuel reading is showing a ideal reading as well but something that ive been noticing lately was, usually when i turn my car off, the fuel pressure drops about 20 psi and will stay like that almost till the next day but lately ive noticed that within 20 mins. of me shutting the car off the fuel pressure will drop to 0psi. sometimes it does that, sometimes it dosent. now i dont exactacly know if that means anything or not but i did notice that the car has been harder to start lately. any suggestions???