Way out of Depth, obd0 - obd1 conversion
Thread Starter
Joined: Aug 2004
Posts: 4
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From: NY, NY, USA
Way out of Depth, obd0 - obd1 conversion
Ok this is my posting in this forum.
My friend and i started about a week ago doing the following swap.
91 civic DX (of course it had to be dualpoint), with AT.
Swaped to JDM D15B vtec, 92 si tranny, chipped P28 ECU.
Originally we left the stock wiring in for the dash, and try'd rewiring the ecu and the engine following the obd1 swap guildlines we had found. To hardly any awail, the battery turn on and some lights, blower and radio all we working but the engine would not turn over.
Next we went to a junk yard and took out all the wiring from a 92 civic LX(all the wiring except lights), and attempted to change all the wiring for the car.
The reason behind this is we thought that the D15B would just simply plug right into the ecu and engine. For that part we were right. However the drivers side dash wiring is a completly different story. It is a mess, pretty much everyting that would could firgure out is wired. However the big question lies with the ignition cylinder. A stock 91 DX has 6 extra wires coming out of the cylinder compared to 92 civic LX. Obviously these wires are just cut and going nowhere.
The current status of the car is that the ECU and engine are all completly wired and for our knowledge correct, but the car is not receiving any power what so ever. When you turn the key nothing happens!!! We have been at this for a whole week no stop. If any one can point me out in any direction i would be very appreciative of it.
Also does any one know car wiring specialists in the DC/Waldorf, MD area?
I think our problem requires professional help. Or at least more experinced guidance. thanks much
jon
My friend and i started about a week ago doing the following swap.
91 civic DX (of course it had to be dualpoint), with AT.
Swaped to JDM D15B vtec, 92 si tranny, chipped P28 ECU.
Originally we left the stock wiring in for the dash, and try'd rewiring the ecu and the engine following the obd1 swap guildlines we had found. To hardly any awail, the battery turn on and some lights, blower and radio all we working but the engine would not turn over.
Next we went to a junk yard and took out all the wiring from a 92 civic LX(all the wiring except lights), and attempted to change all the wiring for the car.
The reason behind this is we thought that the D15B would just simply plug right into the ecu and engine. For that part we were right. However the drivers side dash wiring is a completly different story. It is a mess, pretty much everyting that would could firgure out is wired. However the big question lies with the ignition cylinder. A stock 91 DX has 6 extra wires coming out of the cylinder compared to 92 civic LX. Obviously these wires are just cut and going nowhere.
The current status of the car is that the ECU and engine are all completly wired and for our knowledge correct, but the car is not receiving any power what so ever. When you turn the key nothing happens!!! We have been at this for a whole week no stop. If any one can point me out in any direction i would be very appreciative of it.
Also does any one know car wiring specialists in the DC/Waldorf, MD area?
I think our problem requires professional help. Or at least more experinced guidance. thanks much
jon
Keyboard Humorist
Joined: May 2002
Posts: 9,814
Likes: 11
From: Granada Hills, Ca, USA
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
You fawkt your car up.
You should have just kept on with the rewiring with the stock harness.
did you convert from DPFI to MPFI FIRST before trying to convert to OBD1???
You should have just kept on with the rewiring with the stock harness.
did you convert from DPFI to MPFI FIRST before trying to convert to OBD1???
Crazy Honda Guy
Joined: Sep 2003
Posts: 8,025
Likes: 19
From: Calgary, AB, Canada
Re: Way out of Depth, obd0 - obd1 conversion (4drEF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4drEF »</TD></TR><TR><TD CLASS="quote"> You should have just kept on with the rewiring with the stock harness.
did you convert from DPFI to MPFI FIRST before trying to convert to OBD1???</TD></TR></TABLE>
did you convert from DPFI to MPFI FIRST before trying to convert to OBD1???</TD></TR></TABLE>
Honda-Tech Member
Joined: Aug 2003
Posts: 3,779
Likes: 0
From: Bay area, California
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
u should of just got a obd0-1 harness woulda made ur life alot easier
i have a dx hatch
converted to MPFI/obd1
u convert to obd1 FIRST be4 anything
i have a dx hatch
converted to MPFI/obd1
u convert to obd1 FIRST be4 anything
Member
Joined: Feb 2002
Posts: 1,922
Likes: 0
From: Connecticut, USA
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
Rough deal...
rip it all out and start again using your old harness if possible. this time buy an 0bd0 to obd1 conversion harness.
do alot of searching here...
rip it all out and start again using your old harness if possible. this time buy an 0bd0 to obd1 conversion harness.
do alot of searching here...
Honda-Tech Member
Joined: Jul 2001
Posts: 6,779
Likes: 2
From: Land of the free, whoever told you that is your enemy
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
Start over and use these:
http://www.thezcresource.com/h....html
http://www.knology.net/~jediklc/obd0toobd1swap.htm
I like the last on that is what I used!
http://www.thezcresource.com/h....html
http://www.knology.net/~jediklc/obd0toobd1swap.htm
I like the last on that is what I used!
Thread Starter
Joined: Aug 2004
Posts: 4
Likes: 0
From: NY, NY, USA
Re: Way out of Depth, obd0 - obd1 conversion (4drEF)
It is my understanding the only change with the fuel injection we did was the engine.
The stock dx obviously is DPFI and the new d15b is MPFI.
I dont know what you mean by swapping the two.
Please enlighten me.
jon
The stock dx obviously is DPFI and the new d15b is MPFI.
I dont know what you mean by swapping the two.
Please enlighten me.
jon
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Thread Starter
Joined: Aug 2004
Posts: 4
Likes: 0
From: NY, NY, USA
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
What does the OBD0 AND OBD1 swap harness consist of?
what exactly does it change?
another thing, i do not have the stock harness any more, what should i do now?
thanks much for help and criticism, i am stuck with an f'n car that will not start and have limited founds in purchasing much more wiring equip, or employing professional help.
The car and ecu are all wired correctly. The problem i htink lies with teh wiring under the drivers side. Such as the ignition or something else, it is a big tangled mess down there and quite daunting to look at.
jon
what exactly does it change?
another thing, i do not have the stock harness any more, what should i do now?
thanks much for help and criticism, i am stuck with an f'n car that will not start and have limited founds in purchasing much more wiring equip, or employing professional help.
The car and ecu are all wired correctly. The problem i htink lies with teh wiring under the drivers side. Such as the ignition or something else, it is a big tangled mess down there and quite daunting to look at.
jon
Keyboard Humorist
Joined: May 2002
Posts: 9,814
Likes: 11
From: Granada Hills, Ca, USA
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jpmbjj »</TD></TR><TR><TD CLASS="quote">What does the OBD0 AND OBD1 swap harness consist of?
what exactly does it change?
another thing, i do not have the stock harness any more, what should i do now?
thanks much for help and criticism, i am stuck with an f'n car that will not start and have limited founds in purchasing much more wiring equip, or employing professional help.
The car and ecu are all wired correctly. The problem i htink lies with teh wiring under the drivers side. Such as the ignition or something else, it is a big tangled mess down there and quite daunting to look at.
jon
</TD></TR></TABLE>
The pre-OBD to OBD1 conversion harness is a jumper that goes between your STOCK underdash harness and the OBD1 ECU. It converts all the wiring between the ECU pins to your stock under dash ECU plugs so all the sensors, wiring, etc goes to the right places.
It also provides the necessary wiring for the 4 wire O2 sensor and other OBD1 specific things that your STOCK engine harness didn't have.
Here's a pic for the one offered from this place http://www.boomslang.us/obd0.htm
The DPFI to MPFI conversion should be done first BEFORE trying to convert to OBD-1. OBD-1 cars are all MPFI. Your stock engine was DPFI - upon other things, it only had 2 injectors. MPFI has 4 injectors, a couple extra wires on the distributor to let the ECU know when to fire off the injectors and a couple other minior differences. The links already provided to you will walk you through the simple process of getting your STOCK DPFI wiring set up for running a MPFI engine. It's about 10 steps and you're done. It's really easy especially in comparison to all the mess you have done already.
If you want to do this as CHEAPLY as possible, go get another DX harness.
(I would get one from either a 90 or 91 because people have reported slight differences in the 88-89 engine harness.)
Getting professional help is not really a good option especially since the task as hand is REALLY easy. You are going to pay $$$ for help and they are probably going to make you buy a STOCK engine harness for your car anyway. Just get another DX harness because once you are set up for MPFI then EVERYTHING should be a breeze after that. Just plug in a pre-OBD to OBD-1 jumper harness, do the simple wiring for that, and drive away!!!
what exactly does it change?
another thing, i do not have the stock harness any more, what should i do now?
thanks much for help and criticism, i am stuck with an f'n car that will not start and have limited founds in purchasing much more wiring equip, or employing professional help.
The car and ecu are all wired correctly. The problem i htink lies with teh wiring under the drivers side. Such as the ignition or something else, it is a big tangled mess down there and quite daunting to look at.
jon
</TD></TR></TABLE>The pre-OBD to OBD1 conversion harness is a jumper that goes between your STOCK underdash harness and the OBD1 ECU. It converts all the wiring between the ECU pins to your stock under dash ECU plugs so all the sensors, wiring, etc goes to the right places.
It also provides the necessary wiring for the 4 wire O2 sensor and other OBD1 specific things that your STOCK engine harness didn't have.
Here's a pic for the one offered from this place http://www.boomslang.us/obd0.htm
The DPFI to MPFI conversion should be done first BEFORE trying to convert to OBD-1. OBD-1 cars are all MPFI. Your stock engine was DPFI - upon other things, it only had 2 injectors. MPFI has 4 injectors, a couple extra wires on the distributor to let the ECU know when to fire off the injectors and a couple other minior differences. The links already provided to you will walk you through the simple process of getting your STOCK DPFI wiring set up for running a MPFI engine. It's about 10 steps and you're done. It's really easy especially in comparison to all the mess you have done already.
If you want to do this as CHEAPLY as possible, go get another DX harness.
(I would get one from either a 90 or 91 because people have reported slight differences in the 88-89 engine harness.)
Getting professional help is not really a good option especially since the task as hand is REALLY easy. You are going to pay $$$ for help and they are probably going to make you buy a STOCK engine harness for your car anyway. Just get another DX harness because once you are set up for MPFI then EVERYTHING should be a breeze after that. Just plug in a pre-OBD to OBD-1 jumper harness, do the simple wiring for that, and drive away!!!
Honda-Tech Member
Joined: Dec 2000
Posts: 20,006
Likes: 3
From: Tampa, FL
Re: Way out of Depth, obd0 - obd1 conversion (akb16)
https://honda-tech.com/zerothread?id=997093
Everone has pretty much posted that you need to do the MPFI conversion first. I can help out if you need more info. IM me. I also have P28 ecus as well.
Jason
Everone has pretty much posted that you need to do the MPFI conversion first. I can help out if you need more info. IM me. I also have P28 ecus as well.
Jason
Joined: Apr 2004
Posts: 53
Likes: 0
From: skokie, il, USA
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
i'm sort of in the same boat...
my original OBD0 ECU plugs and big cannon engine harness plugs were snipped off, and OBD1 wires butt connectored in. a one off harness was on the engine, that was a mixture of an OBD1 and an OBD0 harnesses. insane. so i cut EVERYTHING off the engine with lots of wire left on the plugs, and then cut off the ECU plugs. Scary stuff. i had no choice though. the car ran, but that was it. it was a rats nest that was just waiting to break up and leave me stranded.
anyway...
as for the rats nest of wires you have, either get a DX harness and a OBD0-1 conversion harness... or you really have to clean it up. get a big bag of 4" thin zip ties, and go to work. zip tie wires together that go to common connectors. this wire job is going to take a very long time.
my original OBD0 ECU plugs and big cannon engine harness plugs were snipped off, and OBD1 wires butt connectored in.
a one off harness was on the engine, that was a mixture of an OBD1 and an OBD0 harnesses. insane. so i cut EVERYTHING off the engine with lots of wire left on the plugs, and then cut off the ECU plugs. Scary stuff. i had no choice though. the car ran, but that was it. it was a rats nest that was just waiting to break up and leave me stranded.anyway...
as for the rats nest of wires you have, either get a DX harness and a OBD0-1 conversion harness... or you really have to clean it up. get a big bag of 4" thin zip ties, and go to work. zip tie wires together that go to common connectors. this wire job is going to take a very long time.
Keyboard Humorist
Joined: May 2002
Posts: 9,814
Likes: 11
From: Granada Hills, Ca, USA
Re: Way out of Depth, obd0 - obd1 conversion (civic d16z6)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic d16z6 »</TD></TR><TR><TD CLASS="quote">wuz up. i have a 89 civic d15 two injetors and i have a d16z6 and the harness,ecu. but i don't know how to to the covertion
</TD></TR></TABLE>
First you need to do the DPFI to MPFI conversion.
Then you can do the OBD0 to OBD1 conversion.
Search. IT's been covered many many many times.
</TD></TR></TABLE>
First you need to do the DPFI to MPFI conversion.
Then you can do the OBD0 to OBD1 conversion.
Search. IT's been covered many many many times.
Honda-Tech Member
Joined: Jun 2002
Posts: 3,830
Likes: 0
From: YEAH HO, FRISCO, NORCAL
Re: Way out of Depth, obd0 - obd1 conversion (4drEF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4drEF »</TD></TR><TR><TD CLASS="quote">
First you need to do the DPFI to MPFI conversion.
Then you can do the OBD0 to OBD1 conversion.
Search. IT's been covered many many many times.</TD></TR></TABLE>
dang what is up with these n00bs??
First you need to do the DPFI to MPFI conversion.
Then you can do the OBD0 to OBD1 conversion.
Search. IT's been covered many many many times.</TD></TR></TABLE>
dang what is up with these n00bs??
Keyboard Humorist
Joined: May 2002
Posts: 9,814
Likes: 11
From: Granada Hills, Ca, USA
Re: Way out of Depth, obd0 - obd1 conversion (APEX CRX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by APEX CRX »</TD></TR><TR><TD CLASS="quote">
dang what is up with these n00bs??</TD></TR></TABLE>
No idea. They don't internet very well I guess.
Hey - time for you to change avatars!
dang what is up with these n00bs??</TD></TR></TABLE>
No idea. They don't internet very well I guess.
Hey - time for you to change avatars!
Joined: Apr 2004
Posts: 53
Likes: 0
From: skokie, il, USA
Re: Way out of Depth, obd0 - obd1 conversion (jpmbjj)
you're going to need to grab a helms manual, and decipher the ignition switch wiring from the OBD0 side of things. can you just grab the same ignition cylinder from the 92 LX? you won't have the key, but maybe you can swap out the key cylinders.
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