severaltony

Im using a D15b2 Block from a 1988 crx and a Z6 head with brand new distributor and a Obdo to Obd1 Boomslang conversion harness

I have perfect timing and Great spark Great Compression

2 of my fuel injectors are getting no reading on a test light
ive checked the wiring over 100 times and tried using 2 diff computers that can turn on another car

The number 1 injector gets no reading and i dont remember wat the other one was..

Car has no resistor box and im using high impedance injectors so i have the 2 yellow/Blk wires, wired to all 4 injectors to yellow/blk

the o2 is not wired and knock sensor is not wired i do not think this would prevent a car from not turning on

A friend told me that since i do not have a Crank Shaft Positioning sensor that could prevent the number 1 piston not to fire since Obd1 vehicles have a Crank Shaft Position sensor.. is there a set of wires on the Boomslang obdo to Obd1 harness that go to a Crank Shaft Position sensor?? for dpfi to Mpfi conversion... if there is.. is there a way to maybe bypass this step of ignition

Car Gets gas from the fuel pump very strong not a fuel pump issue for sure

i have been trying to figure thos out for a month now u guys are the ones i need to turn to in this time of need please if u have had a similar problem or know how to fix this, Diagrams and wire colors work the best for helping me understand...

Thank you alot for your Help and this will probroally help alot of other people :D

jdm_h22

Even with two injectors not getting signal, it should still attempt start off the other two... assuming that's the only issue you have. Does try to start or nothing at all? Your injectors should be seeing 12v with the key in the start position. The signal wires (the multi-colored ones) are actually ecu-controlled grounds. You should be able to do a continuity test w/ a multimeter between the injector clip and the corresponding pin at the ecu and get continuity. Have you done that?

severaltony

i have not done a continuity test(idk how either). but i did a test light. test while cranking..

The car wants to turn on it really does like i get excited cause i think it does turn on but u turn the key back on its just not enough u know.. it jumps like it wants to come on...

severaltony

ttt

Eze209

On the resistor box, isnt 5 wires that need to get hooked up together? 4 for injectors and one white one? U using the same size injectors?

Eze209

Also double check ur dizzy wiring, i think there is a same color wire(white if i recall) one is thick and the other regular, u can easily mix them up, happen to me once on a mini me swap.

crx_si-r

resistor box is only for the injectors (4) and a power wire from the driver side shock tower plug. idk where your getting white from?

severaltony

Like I said in my main post I'm using high impedence injectors.. No resistor box on a crx

jdm_h22

Obviously someones not reading the original post...

Can you be 100% positive they are high impedance?

Once you've got that out the way, get yourself a multimeter with a continuity feature.. or borrow one. Theyre not expensive.

Sounds like your car is trying to run on 2 cylinders lol. Not gonna happen.

Sometimes if there is a blatant problem your ecu will throw a code immediately.. Do you have a check engine light on? May be helpful to check those codes.


Check this link out:
http://technet.ff-squad.com/wiring/o...schematics.gif

Your 4 injectors correspond to A1 (injector 1), A2 (injector 4), A3 (injector 2), A5 (injector 3)

Hope that helps.

severaltony

Check engine does come on but idk how to get codes I don't have equipment like that..

I geusse I'm not 100% positive just that I got them off a 92-95 civic ex and this guide I was using says that injectors from that car of those years are high impedence if I'm wrong tell me where I can get the right injectors I'll go get them ASAP

crx_si-r

lets start with the easy question first. did you do the mpfi conversion before purchasing the ecu jumper? 98% of all the obd0 to obd1 ecu jumpers all require your car to already be converted to mpfi or be mpfi from factory.

the fact that only 2 injectors are pulsing, leads me to believe that you didnt do the conversion. this would also play in with the addition of the 2 crank position sensor wires from the distributor to the ecu.

severaltony

No I bought the boomslang obd0 to obd1 conversion it has the main harness and then 2 sub harness, a 8 position and a 4 position according to their website this is the correct harness and all wires match up to the instructions.

crx_si-r

link please.

are you positive you wired it correctly?

severaltony

www.boomslang.us/obd0_1.pdf

crx_si-r

Which distributor are you using? Since your trying to convert to obd1 you are using an obd1 distributor, right?

Eze209

Yes its red, 4 black 1 red. I didnt recall color but ur right. I seen some people not Wire up all 5 wires.

Btw what ecu are u using?

severaltony

Using a p28 and a brand new distributor obd1

91 EF DX

Not trying to be a smarta** but did you change the spark plugs?

severaltony

Yep put brand new iridium plugs

shawnpepper

check your continuity first to the ecu, if you can, or know how check the pulse for the non working injectors at the ecm, do they pulse? if yes than your wiring to the ecu from the inj are bad, if no, than you have a crank signal problem.

severaltony

I put a light to the yellow and black and the brown and ask a friend to crank and it does not pulse, ame for another injector but all the others pulse

severaltony

If I get no continuity what do I have to do

shawnpepper

change the wires.

test by using battery voltage connected to a test light, and hit the inj ground pins on ecu, all of them, if 2 work, and the others dont you have a sensor problem

severaltony

Test straight off the ecu or off the wires?

jdm_h22

Umm... the only "special equipment" you'll need is a metal paper clip...

Check Engine Light (CEL) codes can be checked by jumping your
vehicle’s factory 2-pin timing adjusting connector. This
connector is near the driver’s side shock tower on 1988-1989
models and in the passenger side interior foot-well area on
1990-1991 models.