injectors wont fire 1990 civic si

[D15B]

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??

[D15B]

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

[Barefoot]

ok so your injectors just are not firing correct. if so check the resistor box.

[D15B]

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

[Barefoot]

only other thing i can think of is your timing is 180 degree out.

[D15B]

naw the timing is perfect i already checked the timeing to im fuckin stumped

[im_hung]

motor flooded?

[SiRed94]

Did you put a D15B Vtec engine in your car? If so what ECU, Injectors, and Distributor?

[D15B]

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?

[SiRed94]

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.


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.


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.

[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

[SiRed94]

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.

[D15B]

alright that makes sense i used an obd 0 male plug and i wired it up accordingly to the obd 1 dizzy only one wire is diff color the big white goes to yellow blue or something like that but im going to try the resistor box tommarow and hook up a p28 ill keep this thread updated tommarow.i got the 4 wire o2 plug aldo thanks

[D15B]

- Remove the resistor box and wire the one red wire to the 4 black wires

uhmm my wiring harness has 4 red wires and a yellow wire female side and 4 black wires and a red on male male connects to the resistor box what exactly did you say to do? what i saw on rewyre was to just block off the current with a plug
also i think your correct that is a z6 dizzy i see how that would not bolt up now lol like i said i r noob at sohc

oh and i was wrong its a p05 ecu not p07

[SiRed94]

uhmm my wiring harness has 4 red wires and a yellow wire female side and 4 black wires and a red on male male connects to the resistor box what exactly did you say to do? what i saw on rewyre was to just block off the current with a plug
also i think your correct that is a z6 dizzy i see how that would not bolt up now lol like i said i r noob at sohc

oh and i was wrong its a p05 ecu not p07

Let's say on the resistor box side of the plug you have 4 black wires running into the resistor box, and one red wire. Cut all of the wires off that run into the resistor box. Connect the one red wire to all of the 4 black wires. That will eliminate the resistor box.

The P05 is equally as shitty as a P07 ecu for that engine. It is a 1 wire o2 ecu that is for a 70 hp 8 valve non VTEC engine. Try to get a P28 if possible. Your engine will run terrible with that P05.

[D15B]

yea i know itll run like shit for the time being but shit i jnust want to see it start also i was gone ask can a non vtec dizzy fit in the head of a vtec motor just a question i was wondering?...........ok i did the resistor box wiring and still no start this shit is rediculas lol..im also thinking maybe it wont star because maybe the map sensor is bad but im not throwing a check engine for it

[D15B]

all right its puddering every now and then but a small amount of smoke is coming out of the intake manifold and it smells like gas i may have to invest in new spark plugs and wires im thinking any suggestions

[D15B]

back to the top

[D15B]

someone help