1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

fuel injection questions.

Discussion in 'Civic and CRX - EF' started by uptownsamcv, Jul 15, 2008.

  1. uptownsamcv

    uptownsamcv New Member

    Messages:
    31
    Likes Received:
    0
    Joined:
    May 27, 2008
    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.
     
  2. INJEN78

    INJEN78 HS LEGEND

    Messages:
    9,187
    Likes Received:
    121
    Joined:
    Oct 1, 2007
    Location:
    OHIO
    umm what motor is in the car???
    the pressures sound around right,,,but those adjustable FPR gauges are garbage
    and black water?!?!?thats not good..black is rich,but there shouldnt be water
     
  3. uptownsamcv

    uptownsamcv New Member

    Messages:
    31
    Likes Received:
    0
    Joined:
    May 27, 2008
    its a D16a6 with high comp pistons and i think he said the head was had a 3 or 5 angle valve job.
     
  4. t3t4delsol

    t3t4delsol New Member

    Messages:
    652
    Likes Received:
    12
    Joined:
    Mar 18, 2008
    Location:
    York, Pa
    yeah waters not a good sign, has the car been sitting for a while? Cold air intake? if so someone could have hydrolocked the motor and there could be water sitting in the header and exhaust. Is it smoking at all?
     
  5. uptownsamcv

    uptownsamcv New Member

    Messages:
    31
    Likes Received:
    0
    Joined:
    May 27, 2008
    it is definately something with the fuel system. i lowered the fuel preasure to 40 with the vacum line reoved from the AFPR and set it to 40PSI and 30PSI at idle and it runs practlicly flawless. i think i might bump the pressure up to 45 cause thats whats the recomended pressure for the newer resisterless injectors. plus i think it migth be runnin a bit lean cause the engine light came on and it never use to. the car does seem easier to drive now and i dotn have to give it as much throttle as before. only time i realy notice the sputter and its barely noticeable is when im doing around 60 and i hit the gas a certain amount. im thinkign maybe i should change the MAP or TPS sensor.
     
Verification:
Draft saved Draft deleted

Share This Page