im new ot the hinda scene and i have a 89 crx si. the fuel injection system that it came with is a resisterless PR4 A02 its a chipped 90 integra LS ECU. The intake manifold apears to be off a 92 - 95 civic. what im wondering is how high should the fuel pressure be? rigth now its at 45 when idling and jumps to about 60 under throttle. the car came with a adjustable fuel pressure regulator and pressure gauge hooked up. The car idles real low and tends to sputter when i give it a certain throttle amount also spits out lots of black water. and for some reason it seems to pull hardest around 4,800 rpm. im thinkgn of just going with a stock fuel pressure regulator cause i dont see why i realy need the adjustable one. im thinkign its making the car run rich. sorry for the long post.