dinko

Car is a 99 DX Coupe
Motor is OBD1 GS-R
ECU is chipped p28/Neptuned (OBD2 to OBD1 ECU harness connected to it)

ALTERNATOR
I have already hardwired my alternator plug from my old OBD1 harness (which worked perfectly in my EH2 when the motor was in there) onto the OBD2 harness. All four colored wires matched up perfectly. I should be fine right?

DIZZY
I've searched, and people say you can just "repin" the OBD1 dizzy to plug into the OBD2 harness. I was wondering, can I just hard wire the dizzy plugs from my OBD1 harness onto the OBD2 harness? I've taken some pics and labeled each wire in the pics if anybody could take the time to show me how:











I've tried following this how-to, but if you can tell...the instructions have a "dark blue" and a "light blue" that I don't have. I have a regular "blue" but no "dark blue" (unless im confusing the solid "black" with the "dark blue" but it looks like black to me so hah)



VTEC
My next question is about the vtec plugs on my OBD1 harness vs OBD2 harness. Am I able to somehow re-wire these two plugs so that my VTEC works? Sorry such a n00b!










IACV
I also hard wired the IACV plug (2 wire) from OBD1 harness to OBD2 harness (3 wire) according to the http://www.ff-squad.com website. (awesome help that site btw!) the only part i was a lil confused about was about repining the B plug like this when I am using the OBD2-OBD1 conversion harness. Do I still repin this like the instructions say?




If anybody can help, I would greatly appreciate it. I know people have probably made this work before. I plan to resleeve the entire harness with new material/tape (after I get all the hard connections figured out, wire tuck FTW!) so if I need to take this thing apart completely, I'm going to do it anyway.

I understand Peter at Rywire can do all of this for me for $165 (minus a lil HT discount), but I don't have money to throw around and I kinda wanna learn something new.

Thanks in advance!
Dinko


Modified by dinko at 10:02 AM 1/20/2008

dinko

please bump if you view

I just realized rywire offers this harness for $35


but now i realize i have the wrong conversion harness for my ECU....only 2 of the 3 plugs plug in.

MJobe

Help this man out

kptrulee

iTrader: (2)

wiring owns you, haha jp
i hate wiring

MJobe

Off topic but what camera do you have

dinko

after searching around a bit, looks like a 99-00 Si harness would be my best bet as a "plug and play" harness. I realized the jumper harness i received with the car is for a 99-00 Si harness (that's what was used on the car before). I could only get 2 of 3 plugs from the big harness into the jumper harness.

I will have to get a jumper for the OBD2b --> OBD1 I'll probably just keep this stock harness, pin the vtec lines to the ecu, dizzy + injector wires cut/soldered and that should be it i hope.

dinko

this is the plug i can't get into the jumper harness.



Previous owner said jumper harness is obd2B --> obd1. Can someone verify this by looking at these plugs? My dizzy plug is the 8pin design if that matters...how do i tell if i need obd2a or obd2b --> obd1 jumper harness ?

gabebauman

Good luck with the wiring Dinko...this was the biggest headache for me when we did Simon's swap. I wish I could help you out.

PS: passwordjdm sells a bunch of conversion harness stuff now.

http://passwordjdm.com/categor...D=320

dinko

hmm thanks for the link....

looks like its a lil cheaper at password than at rywire for the dizzy harness. sweet

0mtber

iTrader: (2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dinko &raquo;</TD></TR><TR><TD CLASS="quote">this is the plug i can't get into the jumper harness.
Previous owner said jumper harness is obd2B --&gt; obd1. Can someone verify this by looking at these plugs? My dizzy plug is the 8pin design if that matters...how do i tell if i need obd2a or obd2b --&gt; obd1 jumper harness ?

</TD></TR></TABLE>

That is an obd2b to obd1 harness.
The green plug plugs into your in-car harness.
The missing plug should be in your in-car harness.

dinko

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">

That is an obd2b to obd1 harness.
The green plug plugs into your in-car harness.
The missing plug should be in your in-car harness.</TD></TR></TABLE>

good man
i didn't even look under there.

that cuts the headache in half!

salman

In for the Answer..

Blown90hatcH

1. Yes that will work.
2. Rywire can make you the correct distributor harness....or...

OBD1 large plug............. goes to .................. OBD2 large plug
White/Blue ................................. REd
Orange/Blue ............................... Green
White .................................. Black
Orange .................................. Yellow
Blue/Yellow ............................... White
Blue/Green ............................... Blue
Yellow/Green .............................. Yellow/Green

OBD1 small plug .................. goes to ...................... OBD2 large plug
Black/Yellow LARGE ................................... Black yellow small

There is no tach wire on the OBD2 side....so the small blue on the second OBD1 distributor plug needs to get jumped....you can tee this into the yellow/green wire for a tach signal.

3. Yes you can rewire it no problem. Pic 1 and 2 (OBD1 stuff) show the vtec sol...1 wire and the green plug is the OBD1 vtec pressure switch (two wires). Pic 3 (obd2 stuff) shows from the bottom left....water temp (gauge), ECT, reverse on tranny (grey 2 wire)....and not sure on the other two taped off plugs....need colors.
Pic#4 OBD2b....both of those are O2 sensor connectors/wires.
4. If the conversion harness is built correctly, then yes still repin it.

You have an OBD2b to OBD1 ecu conversion harness. The OBD2b civic cabin harness is a single plug...with the other two on the engine harness that go through the firewall.

dinko

if i ever meet you remember i owe you a beer

i'll try to keep the pics hosted if anybody else needs this info.

i'll try to repin everything this weekend. i'll let you know how it goes. might do a writeup?

H22@

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote"> 2. Rywire can make you the correct distributor harness....or...

OBD1 large plug............. goes to .................. OBD2 large plug
White/Blue ................................. REd
Orange/Blue ............................... Green
White .................................. Black
Orange .................................. Yellow
Blue/Yellow ............................... White
Blue/Green ............................... Blue
Yellow/Green .............................. Yellow/Green

OBD1 small plug .................. goes to ...................... OBD2 large plug
Black/Yellow LARGE ................................... Black yellow small

There is no tach wire on the OBD2 side....so the small blue on the second OBD1 distributor plug needs to get jumped....you can tee this into the yellow/green wire for a tach signal.
</TD></TR></TABLE>


Is it just good for the civic Or is good for all Honda Obd swap ?

Hey Dinko,
Congratulation for your search work, I want to make the same swap, You see the end of your project?

tigueremalo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">

1. Yes that will work.
2. Rywire can make you the correct distributor harness....or...

OBD1 large plug............. goes to .................. OBD2 large plug
White/Blue ................................. REd
Orange/Blue ............................... Green
White .................................. Black
Orange .................................. Yellow
Blue/Yellow ............................... White
Blue/Green ............................... Blue
Yellow/Green .............................. Yellow/Green

OBD1 small plug .................. goes to ...................... OBD2 large plug
Black/Yellow LARGE ................................... Black yellow small

There is no tach wire on the OBD2 side....so the small blue on the second OBD1 distributor plug needs to get jumped....you can tee this into the yellow/green wire for a tach signal.

</TD></TR></TABLE>

now is this the same for my 92 DX HATCH
-p06 vtec converted
-obd2b b16a2 swapped

taking note that i wired my own adapter harness for the distributor
(i started the car but it didnt pass 3500 rpms....) so thinkin it would be my wiring
since it was kinda crappy looking i rewired it again and tried it the car didnt turn on so i rewired it again and nothin.... now i rewired it again but i havent tryed it yet....

but my question is
since 92 civic were not equiped wit the CYL sensor in the distributor for more space and lightweight reasons could that be the problem...?

adams90crx@msn.com

Thats the distributor harness not ecu harness my friend

adams90crx@msn.com

You might have the wrong distributor for what your doing main relay could have also COULD HAVE BLOWN IGNITION MODULE THAT WOULD EXPLAIN IT NOT GOING PAST THE LOW RPMS THERE ARE LOWS AND HIGHS ON THE IGNITION MODULE SOMETIMES ONE BLOWS THEN THE OTHER GOES TAKE IT TO OREILLYS AND HAVE IT TESTED ITS PROBABLY blown from the rewiring ITS ALOT EASIER TO BUY THE CONVERSION FOR THE DISTRIBUTOR IN YOUR CASE AND DID YOU CONVERT YOUR COMPUTER TO OBD2? IF YOU NOTICE THIS SAYS OBD1MOTOR TO OBD2 HARNESS ITS A LITTLE DIFFERENT IM PRETTY SURE AN LS DISTRIBUTOR WILL WORK WITH YOUR WIRING FROM THE HARNESS BEFORE YOU CUT INTO IT THATS WHAT I HAD ON MY LS VTEC WITH A B16 I THINK

team G'z

if that a dx obd2a or obd2b wire harness then those two plugs that u wanna know what it is it for ur o2 sensor 1st o2 and 2nd o2

98mugenferio

2. Rywire can make you the correct distributor harness....or...

OBD1 large plug............. goes to .................. OBD2 large plug
White/Blue ................................. REd
Orange/Blue ............................... Green
White .................................. Black
Orange .................................. Yellow
Blue/Yellow ............................... White
Blue/Green ............................... Blue
Yellow/Green .............................. Yellow/Green

OBD1 small plug .................. goes to ...................... OBD2 large plug
Black/Yellow LARGE ................................... Black yellow small

There is no tach wire on the OBD2 side....so the small blue on the second OBD1 distributor plug needs to get jumped....you can tee this into the yellow/green wire for a tach signal.

Im using a 00 ex harness and 00 si ecu with a 00 si dizzy. so the rpm lead signal (dark blue) that goes nowhere on my ex harness taps into the ICM ignitor (yellow green) is what your saying?

webkid90

I know people have probably made this work before. I plan to resleeve the entire harness with new material/tape so if I need to take this thing apart completely, I'm going to do it anyway.
_________________
www.floatingtank.at
methadrostenol

DOHCIVIC

bump

jime64871

iTrader: (1)

Does this really work?

Looneytunerz

QUICK RUN DOWN OF EVERYTHING:
i just slapped a 1990 SOHC VTEC ZC (based off stamp on head) into 1997 civic sedan EX...so i was told and did my own homework and found out that ZC never had a SOHC VTEC zc from factory..i dont know i was told by people that either block is OEM from factory SOHC ZC or i boughtt a Frankenstein motor from H and R motors in EL monte...dunno tho...has VTEC black valve cover and spark plugs and shwer


in order for motor to turn over or get any power we used the dizzy that came with the new ZC motor and cut the connecting clip off the dizzy from my blown D16y8 then soldered dizzy clip onto ZC dizzy so the dizzy can be used on my stock harness . i swapped over crank sensor intake manifold and emissions parts etc. as well as oil pump water pump. bridged or bypassed the knock sensor as well and then reset ecu and removed necessary fuses and yea cam gear is from my D16y8.

car was running good for 4 days but something shorted and long story short... i fixed that issue....

im having some weird electrical issues now....

i then adjusted idle speed and at normal running temp. rpm cluster reads at 1000rpm and if do a rev itl drop and idle at 200-300 rpm and idle at 1000 rpm and then ill give it some gas again and bam back to `100 rpm....

code thrown: 23 knock sensor as well as 8 TDC 1 i guess

there would be times were i had reset everything and no check engine light or cel would appear but after super high rev bam check engine lights on...

whats weird is with those 2 codes thrown sometimes VTEC would krack hard and then other times it goes into limp mode... same codes are thrown

my dizzy is practically advanced to its max
gas is being burnt like nothing...

PROBLEMS: i cant get the mixture right even if my life depended on it haha..gas air and supposedly the mechanically inclined mechanic did the timing supposidly right but from appearance and everything its way off...when idles its sounds fine but then here and there there would be mini miss fires which i dunno if its from bad timing or dizzy and it couldnt be a bent valve because with a freshly re-setd ecu and no check engine idle and motor sounds ok.....

QUESTIONS:
1: What is proper way of doing this swap right and able to just pass normal smog with no codes?
2:Can someone find me a good DIY write up on this swap into an EK sedan?
3: What is order in which i should time first and how..timing belt then dizzy and then idle?
4: What dizzy can i buy brand new and install right into my car with capabilities of running on my stock engine harness instead of color matching and alll that?
5:why does my intake manifold heat up soooo much ?
6:Any help will be appreciated!! since i may not always be online because im homeless if someone could help real quick text me first then call if anything 626 475 8121

spxlazy

get a obd2 to obd1 dizzy harness