How To Convert to OBD1 for any OBD0 Civic/CRX/Integra
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- เผยแพร่เมื่อ 29 มี.ค. 2018
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Jon Widmer
PO Box 13594
El Paso, TX 79913
/ garagebuilthondas
Thanks for watching!
Disclaimer
"Due to factors beyond the control of Garage Built Hondas, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Garage Built Hondas assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair videos. Due to factors beyond the control of Garage Built Hondas, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again, any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Garage Built Hondas."
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Nice work jon but not necesary to change your injectors to obd1 you can leave your obd0 and resistor box and it will work fine💪👍
Thanks for that great info!!
I wanted to get rid of that ugly box. 😁 I'd like to eventually get a tucked harness too so for me it was about trying to get the bay cleaner.
Is there any added functionality with the OBD1 injectors or no difference at all?
It's required to go obd1, but no added benefit stock. However to make it easier to tune, going obd1 is the way to go. Not many options, if really any remaining at all to tune obd0 ecus.
@@GarageBuiltHondas Ok, so the previous comment (RT Motorsports) saying it's not necessary to change them when converting to OBD1 is incorrect?
I should've phrased it better. Are you familiar with the 2 different types of injectors? One works with a resistor box, the other doesn't. He is correct in his statement, I prefer to use obd1 injectors as you'll then have the clips needed for a wide range of other "upgraded" injectors. What setup are you going to have?
I never comment on yt. But i gotta do it right now. Theese videos are the best ef tutorials on the Web. Seriously Man keep up the good work. Hands down.
Thank you for taking the time to leave s comment. I really appreciate comments of this nature. 😀
These how-to vids are gold. I wish more creators could explain this clearly. Of all the YT car, "Senseis," I like you the best. Clearer than Chris fix. Far less annoying than Scotty Kilmer.
Lol at the Scotty comment!!
Other than not being able to say " ing " these videos are the best most informative videos on TH-cam by far. Keep on makeen these vids. Loveen it so far.
Sweet, keeping the old school available adheres to the Honda gods...all respect due
Godsend for this. I'm doing this conversion for a D series VTEC motor, but the concepts are all the same. Many videos for this on YT but they seem to be hillbilly edited, put together, and explained. Yours is great, thank you!
Thanks Alex, hope it helps you get it complete with ease
Nice Jon! I'm swapping over to obd1 vtec soon and got the same harnesses. This pretty much cleared up the whole process I'm soon to do!
Perfect!
Thank u! Stepson butchered his 90 Sedan doing this. U just answered and solved all my probs! Thanks brother! God bless u!
Love it, glad to help!!
Thank you so much for this video, ive been trying to research it online myself but it always seemed pretty complicated. Great job
Grant Bischoff glad to help
Amazing work jon upgrading track car . keep up the good work dude
For everyone wanting to do this conversion for the cleanest result. Don’t cut your wires!!!!! You can de-pin every plug and change the plugs over to obd1. Without ruining your harness or having to solder.
The only wires that will need to be soldered is the 4 for the new o2 and the 2 for the vtec solenoid and pressure switch and 1 for knock sensor. Single cam motors 92-95 don’t need knock sensors
The only time you’ll need to cut wires if you’re doing a dpfi to mpfi on obd0
Automatics can also do the mpfi swap into Efs as well non vtec and vtec
A stock d15b2 crx dx bottom end with 1.6l zc non vtec cam slapped into the head converted to mpfi and a pm9 ecu header and short ram will hold its own against a stock crx si. It will pull from it on take off
And a d16z6 conversion with auto p28 ecu holds its own as well
While autos aren’t the fastest there’s a bit of fun to be had for those who don’t want to drive manual or can’t.
Love your comments. Well thought out and always appreciate the introspective.
I just did this to my 91 hatch last week this video would have come in handy then but me and my buddy figured it out, I love your videos they have helped me out a lot while working on my ef
I bet you learned a lot figuring it out on your own, great job!
Yes i did but i will be using this video if i do anouther ef in the future. Thanks a lot.
You're welcome, and thanks for the support
Videos like this is why I'm a regular here 👍
Thanks Josh
Ive always wondered how conversions were done. Great how to video thanks! Subscribed!!!!
Thanks Jorge
Always very Informative without clutter..👌👍
Henry King thanks Henry
Awesome video, will be doing this soon to mine but will be using OBD2 connectors since my motor has all OBD2 stuff on it, ofcourse OBD1 ECU
Phew... Glad my customer sent me this! He's on it! I thought the additional wiring was for radio when I read them. Lol damn conversion came with no basic instructions, like wire indication.
Greetings from Northen Arizona, Great video! I Feel confident now on converting to obd1. I dropped in a Sir 2 b16a in my 91 si hatch. Gonna run the jdm p30 for now. I have a p28 gonna have it chipped with a b16 base map. Wish me luck!! Nobodys hardly rocking the EF/ED Chassis these days.
Awesome dude!! Good luck, glad you're rocking one also!
I'm 2 years late but today begins my.journey thanks man ✊🏿
Good luck! 👍
Garage Built Hondas 🙂
Great vid jon im in the process of doing this with my OBD 0 b16a in my si hatch
Perfect, hope it helps
I'm about to do this with my 87 hatchback. Awesome & easy to understand. Thank you
Thats a different style not the same car at all but hit up rywire
You have been very helpful and thank you so much ❤
Best how-to channel on you tube; bar none.
Chrisfix
Another great tutorial, thanks !
hond4srule you're welcome
Thank You 🙏 I love your channel learned so much.
Thanks for watching some videos!
Great tutorial! Just want to note one thing: there is a bad batch of eBay harnesses, mine (and others on the forums) had OBD1 pin B3 (pink) in wrong place. It should be one slot to the left, B1. This is the injector ground. I was getting crank but no start until I fixed that.
Thanks for the info!
I wonder if this was my issue with the hamotorsport I had no spark ever fuel and crank couldn't think to continuity test me adapter from that ground pin to injectors I would have found where it was and should be
Same here.. b5 (obd0) to a16(obd1) missing alternator wire making me stall at lights coming to stops and ckp and cyp come out pinned wrong ..and they are splicing into wrong wires or sensors
Thanks 🙏🏽bro for the tips you resolve my problem thanks again for your help 💪🏽
No problem 👍
Great video definitely subscribed to your page. Great build. Keep it up bro.
Will try my best man!!
Good job man you're so helpful 👏 👍 😀
👍😃
awesome! useful for when I get my 4th gen civ in the future :)
I love that getting a 4th gen is a plan of yours. 😁
yeah it's been in the back of my mind for too long haha :)
Found the video very helpful thanks
👍 thanks for watching!
@@GarageBuiltHondas now I know what to do when I b20 swap my DA integra
👍
Nice video man!!
Thank you!
Great video!
Thanks
Hey Jon not sure if your still reading comments on this one but it was a great video! Quick question about the 02 sensor, where exactly did you put it and did you have to weld a bung on?
Made look easy , 👌good video
Thank you
Ty for showing the wiring at 11:40
👍
Thanks for the video!! I cut my c1,c2 wiring and plugged them in tho b10,12 but of the OBD1 ecu 😭
👍
Nice vid man I bought a premade harness for my obd1 a bit more but easier! Straight plug and play
How much was the harness?
Garage Built Hondas I paid 150 I got home in 10 mins car was converted to obd1 guy who makes the is monotech
That's a great price. Maybe I'll try that out next time!
ur a freaking hero dude.
Glad it helps!
Hey man thanks for the great and very informative video like always! Just one question about the adapter harness. Are there different adapter harnesses for an automatic and a manual? Or as long as the ecu is correct for the transmission all adapter harnesses should work?
I'm not sure on that. 99% of the people converting are manual. I would ask a seller of one of the harnesses.
The combinations of errors of these ebay harnesses is crazy.there is a bad batch scenarios where sensors are pinned in extreme wrong places and missing wires..in my case my 1st ebay ecu jumper harness cyp and ckp came out with the wires being pinned wrong.and missing a alternator wire 5v reference..i bought a 2nd one and that one was worst.so i took a wire out of it to install into my first harness which was alternator signal wire b5 to a16
Good content!
Thank you
Hey Jon, Thanks for all the helpful info! Quick question... If I buy a 4wire o2 from an auto parts store, would It be 1 white 2 black and 1 random color on any sensor I get?
Yes.
Ones again my dude, You killed it haha! Good shit man! This conversion obviously gives you some power gain but did you notice any? Dyno tune very soon im sure?
Dude, it felt much stronger at the track. The biggest inclination was this part of the track where it's a long straight, I normally would get to like 95mph but I seemed to be hitting close to 100mph which seemed different. I did however than my fastest outing ever! It feels really good!
Garage Built Hondas Haha that's what's up dude. Tune it now and get all the horses out of your bolt ons my dude. Since your obd1 now. With this obd1 conversion you're definitely getting more out of this motor. Tune it with Crome or Neptune.
I can't wait, been talking to RT Motorsports also and may try out a COP setup before tune but after cams. Hoping this motor is pulling hard by the end of the summer!
Garage Built Hondas so your planning on camming this built?
Yes, I've had them since last summer. Was something I wanted to get in earlier but just have had so many other things I needed to finish. If I wouldn't have swapped shells I probably would have been done already too.
no need to swap injector clips. you can use your obd0 injector clips on an obd1 injector. you just have to trim the inside piece. a lot cleaner this way
Well shit, I knew I could use obd1 clips on the obd0 Injectors but not this way around. Thanks for adding this CJ!!
I don't know why it didn't register, trim the two corner tabs off of the injectors, right?
no. i trim the inside of the obd0 clips. i use bosch ev1 (same as obd0, hard to find new obd1 specific clips idk why) and just trim the inside corners of the center pice and done. use my trusty dremmel. i can email you pics if you like.
Awesome, please!! garagebuilthondas@yahoo.com. I was looking at getting one of your wiring harnesses when you had them on sale a couple weeks back but didn't have the money to spend. I'll definitely be getting one in the future! I didn't know you followed me on here and am flattered that you do, thanks! I gave you a shout-out in a video a few weeks back where we installed a JDM front end on to my friend's crx, you had made the headlight conversion wiring harness for him. 😀
Hello, very informative video, I have bought a converted civic to obd1 and o2 sensor is actually with only one wire coming out of it, it started to throw code 43. Can it actually be ok if I put other same one or should I look for wires that should be for the sensor you have and use the one you do?
Thanks, I'd use whichever sensor is required for the ecu you are running. That should help with any CEL's.
Tom cruise knows his stuff!
😎
Thank you!
You're welcome
Nice video I'm considering doing this to my ef, only question I have is won't the ecu light be on since I'll be using a cable vtec vss instead of a eg obd0 vss?
No. The speedometer is still working.
Great video!! How did the cheap distributor work out?
No issues!
Hi... Amazing video, loved it. I had a question is it possible to convert 2008 suzuki swift from OBD1 to OBD2?
Possibly. If there is a swift before yours that was obd1.
Thanks Sir
Thank you so oooooo much 👍💪💪💪💪
👍
nice convert obd0 civic/crx/integra ecu harnesss ok
Hey i was curious, does it matter which black wire goes to which wire on the little extra harness for the o2 sensor? Got a boosted Da, and this is the last thing i need to do before going down to get tuned d:. Btw thabk you for answering everyones questions, and having such an in depth vid o:. Subscribed for sure
It does not. 👍
Thanks for the support n
@@GarageBuiltHondas O:.... maaaan, i put this off for 6 months to have it not matter??? THANK YOU BRO. assumed since you had 70k+ subs that you wouldnt get arouns to my message, but i REALLY appreciate if my man..
No prob. The 2 black on the o2 sensor are just grounds. If you swap them it'll still work just fine. The directions even say "ground", that's it. Lol
On the obd0 to obd1 ecu jumper harness.. Ive just got a single cam D16a swap. Do i need to do anything with the intake air bypass signal wire? Or is that one im not gonna use.
Hey bro where did you get the diagram for the extra cables? I have a b16 on my CRX but I wanted to check if everything is plugged the same but I can’t find anything to see the diagram. Thanks bro & cool video.
The instructions were included on the eBay listing.
I have been watching you for a couple years and I am wondering if you can convert a 1.5 liter Dx digital injected motor into a coilpack instead of wires.
Possibly if you can find the parts needed. I'm sure there are some sohc's out there that are making big HP that are on a COP setup.
lol "Purchased" From a junk yard nice video bro!
All day!!
Two dollars.lol
question where would i plug the green wire the iab on a gsr intake because i cant find anything on it and my vtec wont engage and everythings right i just dont have an 02 hooked up atm
I'm a bit confused by the discussion on the injectors. I have a 1990 CRX Si, and I'm putting a '98-'01 H22A, which I guess is OBD2, so should I go get OBD1 injectors and adapt my D16 injector harness to those? Or can I run the OBD2 injectors?
Which ECU are you using? Use the corresponding injectors to go with your ECU. You can use whatever you want depending on any conversion harnesses you want to use. It's up to you.
Best video I have seen so far. I have an 88 civic hatchback and I am doing a d16z6 conversion would the process be the same and is it the same harness. I do know the ECU is p28 and if it's not the same harness how do I find these?
Same exact process as this video. You'll have to add your vtec wiring and knock sensor also.
@@GarageBuiltHondas I'm new can you specify vtec wiring?
The process would be the same if I swap in d16z6? Awsome information
Yes
is there a way to convert OBD1 to OBD2? I have a 95 civic with OBD1.
No one does that..however if you have everything on your engine or your entire engine is out of a 96-01 then you need obd2 engine harness with obd1 ecu plugs
I sorry for this ? But I have a integra obdo and I'm reading 14 volts on it the car was having a problem because they put a obd1 dizzi using the pr4 obdo ecu do I have obd1 injectors or stock I can figure out if they do that mistakes too
Ebay sells the mini harnesses for dizzy and ecu conversion for $37 with free shipping, if you ever want to mention that.
@ 1:30-1:40
What did you do with the wire that goes from the ECU to the resistor box? Thank you for all the diy videos they've been a big help with all my EFs
It's the 5th wire that gets soldered together at the resistor box. Leave it attached at the ECU and solder it with the 4 from the injectors.
Thanks that's what I ended up doing because I hadn't done it the first time around and the car wasn't turning on
I'm doing this conversation and I bought obd1 injectors and went to change them out and the plugs fit without changing them they just plug right in I checked and the injectors I pulled out are low impedance
👍
Hi mate, Hoping you still read these comments. did a JDM D15 swap dual vtec, into a 1991 HF CRX. Have the Rywire harness, everythings hooked up. No resistor box due to obd1 injectors. We are not getting any injector pulse, car starts on starting fluid but wont start without it. Has spark and fuel, just seems to be an issue with the injectors not pulsing. How do we fix or trouble shoot this? cheers
I'm unsure. Sounds like it may be a harness issue. You should contact Rywire.
Did you need to do the point fuel injection multi-port fuel injection conversion? Or was this on an si
This is an Si. You'll have to do the mpfi conversion before doing this. th-cam.com/video/igGZthAHGSI/w-d-xo.html
Great video, I just this same exact swap on my crx, having difficulty with starting. Does the obd1 ecu have to be P75 and does it have to be basemapped aswell?
You didn't specify what engine.
@@GarageBuiltHondas sorry about that, yeah I have a b18 head with a b20b4 block, everything stock injectors intake etc etc. My crx si had its original d series motor obd0. I did everything you did step by step except I had a different obd1 ecu. The ecu I purchase the guy said it was a p28 chip in an civic vtec. That why I ask about the ecu being a p75 and basemapped. Cause the car cranks and seems like it wants to start but doesn't. CEL light turns on but off after crank no codes. Cars has spark, fuel, and compression. I triple check the timing on cams and cranks to be all line up. Suggestions?
Try a known working stock ECU. Nothing chipped.
I assume you did the dpfi to mpfi conversion?
Hey man I got everything to do this I need to know if I can some information on how to do the wire to the ecu
This video shows how to use the obd1 harness with the ECU.
To convert back to obd0 could you help, I have a 91 rt4wd with an auto tranny, and they did the obd1 conversion, and I can't find anything on how to convert back, cause it doesn't work with a auto... please help... thanks
really nice work im doeing a b18b1 into my 91 dx crx engine bay harness is complete my question is where did you get your ecu harness that plugs into the p75 and last question what ecu should i use a p75 as well thanks for all your videos really help
P75. I linked the harness in the description. It's a subharness for the conversion.
I have a wagon 4wd with a d16a6
Will any obd1 ecu work?
What ecu could i pick up.
And what distrubutor would i need.
I think i retain stock injectors for a withe with the resistor box(having read the comments)
Before going turbo in the long run
Besides tuning capabilities what benefits will i gain from it?
P06 would be best since it's non-vtec.
92-95 Civic DX distributor.
Not really much gain going obd1, except tuning capabilities.
So for.my crx for all the distributor wiring, do I need to have an obd1 distributor since it's a d series or is the sub harness enough for the p28 I'm putting in?
You need an obd1 distributor for an obd1 ECU.
Yay tuneability
It's about time!
I have a SOHC ZC (non vtec) and I’m going turbo.
Can I just swap the ecu with a chipped obd1 with conversion harness, obd1 distributor and conversion plugs?
Yes
Hello, nice video but I have some little different questions. Im running eg4 (dpfi OBD1 sohc) and I'm planning to put D16A9 (mpfi OBD0 dohc), so i need (want) to chage motor wiring to OBD1, So I need to replace distributer with OBD1 one, replace thermostat with OBD1, use OBD1 injectors, 02 sensor with 4 wire (instead the OBD0 with one wire)? Im planning to use d16z6 motor installation wires and my tranny (because I want to stay with hydro not cable one). Do I need anything else? Do i need to add some wires to my original car installation because dpfi to mpfi? (Car installation is stock from b2 engine, and the motor installation will bi swapped with d16z6 one. Also which ECU i should run? Can i use harness OBD1 to OBD0 ECU? Or i can run some other OBD1 sohc mpfi ECU like from d16z6 or d15b7? Thanks a lot. Greetings from Croatia!
You'll need to first do a dpfi to mpfi conversion and also use the obd1 conversion harnesses. That'll get you set up to running the engine correctly. Easiest option would be to use your existing wiring harness and convert it to be mpfi. Using a harness from an mpfi car will not work unless you use the underdash harness also.
have a 91 crx converting from obd 0 to obd 1 theres 1 problem im going to run into do i need a adaptor of some sort for my alternator plug any help would be awesome subscribed and liked keep the videos rolling thanks
No. Obd1 alternator have the same plug.
Thanks your awesome thank you
You're welcome
Hey this is kinda a old topic but its regarding your ikon Motorsports lip on your old yellow crx. I am trying to buy the same one but for my 90 crx HF. Are the bumpers the same and will it fit?
They are different. It might fit still as they are shaped similarly. It's worth trying, they are only $45
Hi! I have a big question and I want to know if you can help me.
I’m trying to put a d16y8 engine in my wagon but need to know which distributor will fit in it or if I can use a d16y8 distributor changing the pins of the plug from obd2 to a obd1 conector
Hope you can help me
No idea. Depends on which obd you want to run and then you can go from there. They make harnesses for all of them.
Can I use the obd0 harness without doing the mpfi conversion and instead get adapter for the injectors that convert the obd0 injector wires to obd1 ?
Yes
12:22 why not the yello SCS wire? do you not read engine codes? ive got a b20vtech im trying to see if i can get engine codes, ive tried jumping d22 and d04 on my p28 ecu but it just gives me a solid cell. maybe its because the engine light on my 88 civic was never meant to blink out codes? or perhaps it has to do something with the jumper harness to the ecu? also noticed that there was a wire piggy backing off the d04 wire, anyways any ideas or suggestions is appriciated.
A13 my guy
Is there any way you can list all the things you need and will it work on my 89 Ef hatch with a d16y5 with a z6 head?
Just the things in this video. But a different ECU. You'll just add more wires for the vtec and knock sensor.
Question for the obd0-obd1 conversion I have the distributor and the jumpers, do I need to have the ecu in hand for it to work ?
Yes
Quick question if you don’t mind I have done this on my ef with lsv setup won’t rev over 4 k chipped p28 ecu this same ecu was put in a buddy mines b20b runs well with this ecu but if kept obdo stock ecu runs fine ls in it now not sure what could be the problem
No idea. Any CELs?
What's up Jon I have a question for you about the suspension on the wagons. Is there any other good coilovers besides the function ones. Is there a part number for them. Thanks
Coilovers are all preference. All of them for the 89-91 Civic/CRX will fit. It really depends on your budget and what you want out of it.
OK so I won't have any issues installing them on a wagon. And thanks you're videos are grate... Keep it up... 👍
Hey I did this conversation and the ingine is flooding very hard to start and when I get it started gas is dumping in the exhaust
You may have a stuck open injector. Wiring is 100% correct?
What would you add too this for doing multi point injection swap at the same time?
All the required MPFI parts. th-cam.com/video/igGZthAHGSI/w-d-xo.htmlsi=wvee2t76wAXQgE7i
Question: just purchased a complete 92 integra. I wanted to swap over to my EF. Do I still need to do this if im running everything off 1992 integra. My ef is a 1990 oem dual point oem stock
Yes. You're car is obd0. You can't use the wiring harness from the Integra without some extensive modification trying to figure out which wire goes where. Not worth it to attempt that.
I have a doubt. I have a crx hf multipoint (as si, small inyector size and intake manifold) I Will go to obd1. Can I keep resistor box or I have to delete it? I am using 92-95 inyectors and oem clips
You can delete it using those injectors.
so what wire from the sub harness wires into the second black wire into the o2 connector
Either black. They are both grounds.
Now the car is switched to obd1 one. What to do when engine light is on😩
90 civic wago with d16z6 ob1 conversion with chipped crome ecu
I pin the blue connector in passenger seat and light just stays on
You'll need a non-chipped ECU. Or download crome and look into what the CELs are on for.
Sir what type of ecu did use in this particular vide0? The one that you replace is it the same as the defective one? Tanx
Yup
Hello hello quick question, I have rt4wd stock engine Obd0 I purchased the Obd0-1 ecu pigtails and the distributor pigtails too I will need a o2 sensor listed in the video and the p28 with hondata . Do I also need the injectors ? As well or I keep the stock one?
You can use the stock injectors if you keep the resistor box.
hi, my diagnostic signal flash all the time without the shunt. Have you an idea ?
What car, what ECU, what on-board diagnostics?
Would this work for an 87 prelude Si ?, I have an odb0 fuel injected a20a3. thanks!
Rywire .if he hasnt worked with that then youre on your own
I'm swapping a b16a into an 89 si hatch,Since your swapping to OBD1,can u just use 1 O2 sensor?
Yes