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Thread: injectors wont fire 1990 civic si

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  1. 07-01-2009, 03:02 PM #1
    D15B
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    Default injectors wont fire 1990 civic si

    ok i just did a d15b swap in my car i have compression and i have spark but for some reason my injectors wont fire...i made sure that the ground on the termostat is good and yes the main relay is fine...fuel gets to the injectors but the injectors wont fire any solutions??
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  2. 07-01-2009, 03:31 PM #2
    D15B
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    sorry double post ok fuel working has compression gets spark no start all the fuses are good i dont know what the fuck is wrong
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  3. 07-01-2009, 03:56 PM #3
    Barefoot
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    ok so your injectors just are not firing correct. if so check the resistor box.

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  4. 07-01-2009, 04:27 PM #4
    D15B
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    i got the injectors to fire but it still wont crank i got compression fuel and spark should start right? hmmm if im getting compression could the motor be blown? I R NOOB first swap by myself
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  5. 07-01-2009, 07:16 PM #5
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    only other thing i can think of is your timing is 180 degree out.

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  6. 07-01-2009, 10:19 PM #6
    D15B
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    naw the timing is perfect i already checked the timeing to im fuckin stumped
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  7. 07-01-2009, 10:29 PM #7
    im_hung
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    motor flooded?
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  8. 07-01-2009, 11:20 PM #8
    SiRed94
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    Did you put a D15B Vtec engine in your car? If so what ECU, Injectors, and Distributor?

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  9. 07-02-2009, 12:08 AM #9
    D15B
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    i got a pm6 ecu and a p07 i got a y8 dizzy and all d and b series injectors are the same just about.... the injectors squirt now btw and yes to the thread 2 up maybe it is flooded how to unflood?
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  10. 07-02-2009, 12:29 AM #10
    SiRed94
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    Quote Originally Posted by D15B
    i got a pm6 ecu and a p07 i got a y8 dizzy
    OK.... what ecu is in the car? Is the car wired for OBD0 or OBD1? An OBD0 ECU will not work with an OBD1/2 distributor even if you repin it/swap plugs.

    Quote Originally Posted by D15B
    all d and b series injectors are the same just about....
    Yeah the CC ratings are all about the same. But some are low impedance requiring a resistor box and some are high impedance.

    Quote Originally Posted by D15B
    maybe it is flooded how to unflood?
    Remove all of the spark plugs, unplug the injector connectors and turn the engine over a few times.

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  11. 07-02-2009, 01:09 AM #11
    D15B
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    thanks for the unflood info havent tried it yet..... i have the jumper for the po7 im thinking maybe i need the p28 to make it run...and i have a resistor box hooked up for the injectors but there obd 1 i filed down the groves to make it sutible for obd 0 so they fit in and squirt fine...btw not to ride dick or anything but i think your going to be the one who helps me start this car lol
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  12. 07-02-2009, 01:37 AM #12
    SiRed94
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    Quote Originally Posted by D15B
    thanks for the unflood info havent tried it yet..... i have the jumper for the po7 im thinking maybe i need the p28 to make it run...and i have a resistor box hooked up for the injectors but there obd 1 i filed down the groves to make it sutible for obd 0 so they fit in and squirt fine...btw not to ride dick or anything but i think your going to be the one who helps me start this car lol
    If the injectors are High Impedance injectors from an OBD1 SOHC remove the resistor box. If you are going to use the Y8 distributor you will need an OBD1/OBD2 ecu and convert the car accordingly. If you have an OBD1 D15B VTEC engine, I am really not sure how you bolted up a Y8 distributor. That PO7 Ecu needs a 5 wire O2 to operate correctly, but is going to make that D15B run like shit regardless.

    Here is what I would recommend if you are running a D15B VTEC.

    - Put the original A6 harness on the D15B plug everything up.
    - Find a Z6 distributor, bolt that up.
    - Convert the car to OBD1 with a jumper harness or whatever, add the
    necessary wires.
    - Trade those ecu's or sell them for a P28.
    - Remove the resistor box and wire the one red wire to the 4 black wires
    - Make sure you are using a 4 wire O2 sensor.

    Everything should work then. It may seem like you are getting spark if you somehow wired the the Y8 dizzy to the OBD0 harness, but really it is a very weak spark that is inadequate to ignite your air/fuel mixture. And when you put a resistor box on High Impedance injectors, they will not flow as they should.

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  13. 07-05-2009, 04:24 PM #13
    D15B
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    back to the top
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  14. 07-06-2009, 03:35 PM #14
    D15B
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    someone help
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