Mini me, obd1 mpfi wiring help - D-series.org

jrz88dx · 03-20-2010, 01:58 PM

Hello d-series!
I have a 91 Crx Dx with the obd0 d15b2(junk). I'm currently building a d15b7/d16z6 obd1 mini me. I have the engine about 90% together.
the b7 came with parts of the engine harness like injector clips, random plugs etc. I have a obd0-obd1 ecu jumper harness with extra wires to run to the o2 sensor and vtec solenoid

My question for the d series gurus here is what do i have to change/add on my stock b2 harness to convert over to mpfi/0bd1. Every writeup i've seen runs things to resistrors and obd0 ECUs while I have an obd1 p28 ecu and no resistor. i know i have to add two more injector clips then run wires somewhere, but no idea where(ecu?)

Someone, ANYONE please help. Pictures, links, diagrams anything is useful cause wiring is so flippin confusing.

If someone knows exactly what i'm trying to do and can help you can email me Brettnj@gmail.com

91Demon_Hatch · 03-20-2010, 02:33 PM

Check out what I posted in these threads.

Here is the ecu wiring stuff.
Obd1 few pin questions

This is the engine bay wiring stuff.
Obd0 to obd1 question

Find an obd1 ecu pin out pic.

jrz88dx · 03-20-2010, 02:45 PM

good threads!!

jrz88dx · 03-20-2010, 02:54 PM

one question, when wiring the two new injectors to the ecu pins, do i run them as injectors 3 & 4?

91Demon_Hatch · 03-20-2010, 03:02 PM

yes, this shows the std/dx ecu pin out next to the si/hf.

ECU Pinouts

sleepingciv · 03-20-2010, 03:04 PM

no u dont

jrz88dx · 03-20-2010, 03:28 PM

Quote:

Originally Posted by sleepingciv

no u dont

i run them as injectors 1 & 2
ecu pins A1 and A3

91Demon_Hatch · 03-20-2010, 04:47 PM

You add the wires form pins a3 to #2 and a7 to #4 and use the existing wires for #1 and#3 I think.

Follow the instructions for the injector wiring here.
DPFI to MPFI writeup

Sorry if I confused you.

jrz88dx · 03-20-2010, 05:06 PM

now THAT is EXACTLY what i need
but i'm gonna be running obd1 so i should just wire injectors 2 & 4 to P28 A03 and A02
instead of obd0 ecu a3 and a7

jrz88dx · 03-20-2010, 06:36 PM

Now since i am using a jumper harness it seems that these pin locations might have wires in them? Do i just remove the wires from these locations and run my own wires from the injectors to ecu locations?

Onatop · 03-20-2010, 06:41 PM

no just add them to the jumper.

jrz88dx · 03-20-2010, 07:43 PM

gotcha

jrz88dx · 03-20-2010, 08:03 PM

this is my question

you can see that a wire goes into a02 and a03 on the obd1 jumper
don't i need to run wires from these two locations to the new injectors?

Onatop · 03-21-2010, 08:14 AM

no cause they run to the obd0 side of the jumper all you need to do is pin your injector wires to the obdo side of the plug.

jrz88dx · 03-21-2010, 01:42 PM

there is two wires that run from the injectors, i'm guessing one from each runs to the ecu jumper and the other is ground??

Onatop · 03-21-2010, 01:58 PM

the other wires are 12v source which comes from the main relay on through to the driver side shock tower plug.

jrz88dx · 03-21-2010, 06:17 PM

so do i just splice into one of the other injectors 12v wires?

03-20-2010, 01:58 PM	#1 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	Mini me, obd1 mpfi wiring help Hello d-series! I have a 91 Crx Dx with the obd0 d15b2(junk). I'm currently building a d15b7/d16z6 obd1 mini me. I have the engine about 90% together. the b7 came with parts of the engine harness like injector clips, random plugs etc. I have a obd0-obd1 ecu jumper harness with extra wires to run to the o2 sensor and vtec solenoid My question for the d series gurus here is what do i have to change/add on my stock b2 harness to convert over to mpfi/0bd1. Every writeup i've seen runs things to resistrors and obd0 ECUs while I have an obd1 p28 ecu and no resistor. i know i have to add two more injector clips then run wires somewhere, but no idea where(ecu?) Someone, ANYONE please help. Pictures, links, diagrams anything is useful cause wiring is so flippin confusing. If someone knows exactly what i'm trying to do and can help you can email me Brettnj@gmail.com

03-20-2010, 03:04 PM	#6 (permalink)
sleepingciv Wheres the engines Ted?? iTrader: (100) Join Date: Oct 2008 Location: warsaw indiana Posts: 7,594 Rep Power: 27	no u dont __________________ PM me for dpfi to mpfi obd0 or obd1 harnesses

03-20-2010, 05:06 PM	#9 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	now THAT is EXACTLY what i need but i'm gonna be running obd1 so i should just wire injectors 2 & 4 to P28 A03 and A02 instead of obd0 ecu a3 and a7 Last edited by jrz88dx; 03-20-2010 at 05:10 PM.

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03-20-2010, 02:33 PM	#2 (permalink)
91Demon_Hatch Member iTrader: (0) Join Date: Oct 2007 Location: Hellview, CA Posts: 58 Rep Power: 0	Check out what I posted in these threads. Here is the ecu wiring stuff. Obd1 few pin questions This is the engine bay wiring stuff. Obd0 to obd1 question Find an obd1 ecu pin out pic.

03-20-2010, 02:45 PM	#3 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	good threads!!

03-20-2010, 02:54 PM	#4 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	one question, when wiring the two new injectors to the ecu pins, do i run them as injectors 3 & 4?

03-20-2010, 03:02 PM	#5 (permalink)
91Demon_Hatch Member iTrader: (0) Join Date: Oct 2007 Location: Hellview, CA Posts: 58 Rep Power: 0	yes, this shows the std/dx ecu pin out next to the si/hf. ECU Pinouts

03-20-2010, 04:47 PM	#8 (permalink)
91Demon_Hatch Member iTrader: (0) Join Date: Oct 2007 Location: Hellview, CA Posts: 58 Rep Power: 0	You add the wires form pins a3 to #2 and a7 to #4 and use the existing wires for #1 and#3 I think. Follow the instructions for the injector wiring here. DPFI to MPFI writeup Sorry if I confused you.

03-20-2010, 06:36 PM	#10 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	Now since i am using a jumper harness it seems that these pin locations might have wires in them? Do i just remove the wires from these locations and run my own wires from the injectors to ecu locations?

03-20-2010, 07:43 PM	#12 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	gotcha

03-20-2010, 08:03 PM	#13 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	this is my question you can see that a wire goes into a02 and a03 on the obd1 jumper don't i need to run wires from these two locations to the new injectors?

03-21-2010, 01:42 PM	#15 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	there is two wires that run from the injectors, i'm guessing one from each runs to the ecu jumper and the other is ground??

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03-21-2010, 06:17 PM	#17 (permalink)
jrz88dx n00b iTrader: (0) Join Date: Mar 2010 Posts: 12 Rep Power: 0	so do i just splice into one of the other injectors 12v wires?