ok I dropped a 93 LS motor (obd1) into my 89 civic std hatch. Instead of doing the MPFI swap first and then the OBD1 conversion, I did both at the same time. I have 2 questions.

1.)The DPFI harness has only 5 wires for the dizzy and the OBD1 dizzy has 7 wires. I matched the 5 wires from the DPFI harness color for color with the OBD1 dizzy and the 2 wires left are BLUE/YELLOW and BLUE/GREEN. I need to know where those 2 wires need to be hooked up?

2.)I also have 2 fuel injector wires that arent hooked up. The BROWN wire from the #1 fuel injector and the BLUE wire from the #3 fuel injector. i need to know where to hook those up?

I hope you can understand what im asking and i appreciate any help you can provide. thanks

 

for the fuel injectors: I think that the BROWN #1 fuel injector goes to A1 at the ecu and the BLUE #3 fuel injector goes to A5 at the ecu, but im not sure...I've confused myself by doing both conversions at the same time.

 

1. Depin the Orange wire at ECU pin C1 and insert it into B10
2. Depin the White wire at ECU pin C2 and insert it into B12 (if there is wire already at B12, disconnect it)
3. Connect the Yellow wire from the DPFI Auxiliary Injector to the Brown wire on Injector #1.
4. Connect the Red wire from the DPFI Main Injector to the Light Blue wire on Injector #3.
5. Run a new wire from ECU pin A3 to the Red wire on Injector #2. (Cut the existing wire at the ECU)
6. Run a new wire from ECU pin A7 to the Yellow wire on Injector #4. (Cut the existing wire at the ECU)
7. Run a new wire from ECU pin C1 to the Blue/Yellow wire on the distributor.
8. Run a new wire from ECU pin C2 to the Blue/Green wire on the distributor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">
3. Connect the Yellow wire from the DPFI Auxiliary Injector to the Brown wire on Injector #1.
4. Connect the Red wire from the DPFI Main Injector to the Light Blue wire on Injector #3.</TD></TR></TABLE>

I matched up the injector wires color for color (yellow-yellow/red-red) to the DPFI connectors and now have the brown and blue injector wires left.

 

The DX has 2 injector plugs on it, cut them off as close to the plug as you can.

Connect all the yellow/black wires from those injector plug wires and solder them all together. From that combined connection solder on another wire and run it to the yellow/black wire on the Injector Resistor Box.

Now connect the solid yellow wire from the DX injector to the #1 injector

Then connect the solid red wire from the DX injector and run it to the #3 injector
Connect the A3 wire to the #2 injector
-Connect the A7 wire to the #4 injector
-Now run a wire from the right side of each injector plug and connect it to the red/black wires on the injector resistor box (or solder all wires together including the yellow/black one you combined earlier)

For the 2 extra wires you need for your dizzy, you need to run them from C1 and C2 by the ecu. C1 i believe goes to the blue/green wire and C2 is the blue/yellow wire left over on your new dizzy. Hope this helps.

 

Subscribed because I'll DEFINITELY need this later.

 

I think i figured it out on my own...and i didnt have a resistor box in the std model, but i would be eliminating that anyway with the obd1 injectors and clips, which i already completed. Thanks for the info, ill have to double check my wiring with that.

 

I think my problem is because i used this for my wiring http://www.boomslang.us/obd0_1.pdf which seems to be different from all other writeups...

 

The boomslang writeup says to attach the DPFI yellow injector to the #4 injector clip. Most other writeups say to attach the DPFI yellow injector to the #1 injector. I guess the boomslang one is just all backwards? as long as i follow the way you said to do it i should be ok right? I just wont be able to go by color since i already spliced the 2 DPFI wires to the injector clips. I'll just follow the instructions you provided and see where i end up...

 

ok all the wiring is finished. the car cranks but wont turn over I need a new TPS Sensor, there isnt one on the car right now, would that prevent it from starting?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaFerris &raquo;</TD></TR><TR><TD CLASS="quote">The boomslang writeup says to attach the DPFI yellow injector to the #4 injector clip. Most other writeups say to attach the DPFI yellow injector to the #1 injector. I guess the boomslang one is just all backwards? as long as i follow the way you said to do it i should be ok right? I just wont be able to go by color since i already spliced the 2 DPFI wires to the injector clips. I'll just follow the instructions you provided and see where i end up...</TD></TR></TABLE>


thats why when you wire you own car you should know what every wire does and how it works. it doesnt matter which wire goes to which injector, what matters is that #1 injector goes to A1, #2 injector goes to A3, #3 injector goes to A5 and yeah the last one. because i just did a mpfi swap on someones car and i wired the injectors all backwards so all i did was swap pins at the ecu and that corrected it.

are you getting spark? compression? timed right?

 

UPDATE: I finally got a new tps sensor to install but now the car won't even crank anymore. Before i put the TPS in i thought id try to strart it again to see what would happen, and then nothing. The car has power and the battery is charged. Everything seems to be working like before except it wont crank now. What changed or what could the problem be? im so lost...

 

ok ive got the car cranking now and i installed the TPS. Still won't turn over It is getting fuel. It has brand new plugs and wires. I guess i'll have to check for spark anyway. I dont know how to check the compression or timing

 

have you read through the links provided in the CRX / EF Civic FAQ? I followed those exactly to the T and got my buddy's mpfi conversion done in 1 day. dont go thinking that you can match all the wires color for color and theyll work. only the dist you can do that. then with the 2 left over you run those according to the mpfi instructions. a few posts above they pretty much state the whole procedure exactly. why not use the obd0 injectors with the resistor box? seems like youre making more work for yourself.

 

thanks for the info. and i converted to obd1 because i already had all the parts needed that i got with my obd1 motor. it wasnt that much more work at all. plus i have an std model so i didnt have a resistor box to begin with.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaFerris &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the info. and i converted to obd1 because i already had all the parts needed that i got with my obd1 motor. it wasnt that much more work at all. plus i have an std model so i didnt have a resistor box to begin with.</TD></TR></TABLE>
so it came with a p75 ? did you use the rywire harness for the ecu?

 

came with a pr4. and the conversion harness i bought was a homemade rywire copy.

 

cool.is it runnin good now?

 

no it still won't start

 

damn. no codes on the ecu? u pinning the dist right? gettin spark?

back to what were all saying, you DID FOLLOW THE EXACT INSTRUCTIONS LISTED ON THE MPFI PAGE?

 

I had someone come help me and found that im not getting any spark The wiring was checked and checked again and its all right.

 

what do you mean by pinning the distributor? sorry if thats a dumb question

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaFerris &raquo;</TD></TR><TR><TD CLASS="quote">what do you mean by pinning the distributor? sorry if thats a dumb question </TD></TR></TABLE>

i mean is the dist. wired up correctly? did you use colored wires for all the wiring? ill get pics of the mpfi me and a friend did to help you out

 

for the distributor wiring make sure that the blue/green and blue/yellow wires are hooked up to the distributor and the ecu real good. i think they go to c1 and c2 if you did the obd-0 swap to i cant help much after that. but im with you on the not starting thing on the obd 0 page anyway. good luck

 

cool thanks for the help guys. i appreciate all the help i can get.