DPFI to MPFI Distributor & ECU Wiring Guide - 88-91 Civic & CRX 

This is an excellent swap for anyone looking into getting it done. Jon does a great job showing you everything you need to know.

Excellent work, as always, Jon! This is the one I wanted to watch most. All those hoses were such a mystery to me. It was really helpful to hear your narration. Cheers!

Another good install vid. Great to see the single dingle running sweet. We await the dyno run and pulls. Awesome stuff man!

Another solid upload!

Good stuff John,just dropping knowledge! thanks again! keep it up! 👍✌😎

Good stuff man, that large nut for the fuel line is a "fuel pulsation damper" it helps to dampen the pulsating fuel the pump creates. Can't wait for the dyno results you are making us hyped lol

Another great video. This is definitely going to help me in the future.

good videos everytime!

Good work Jon, cheers Greg

Great video! Im subbed!

I finally found PM-6 intake manifold! Guy just handed it to me for free! It's completely bare but I can replace all the sensors and throttle body very easily. I can finally start on my own MPFI

Well done nice job

Nice Jon

Well I was considering doing the swap until I looked it up on RU-vid and followed this little series. Wireing is not my strong suit and that was a lot of it lol great video thanks

nice video!

How did you become so knowledgeable about all these mechanics, did you work as a mechanic? Also, are you just this godly at hondas, or all manufacturers (Subaru, Toyota, etc)?

Awesome, now to the dyno .

Great walkthrough. I got my 89 CRX started. It had a blown fuse in the alternator spot and a bad fuel pump. Now I'm getting a code 4 though. I have a aftermarket distributor.

thanks in advanced

Hey john I got a s20 transmission from an eg I wanted to go hydro on the ef and also do the dual to multi point conversion..is the wiring different for the trans?

So I have a wagovan and the b12 was empty no white/red wire I’m not getting power to resistor box from a12 pin any answers? Code is 10 is present

Hate to ask this as this question may sound dumb but where can I get the mpfi distributor plug from? I live in mn and have been searching everywhere for one and can't find one anywhere

Do I of to get the resister box i need to go to four injecter but i dont ave any resister box

I have obd0 injectors Reyes to install the resistor box but no luck😔

Thanks for the helpful vids. Ended up buying a D15B7 with a blown head gasket and it had a PM6 manifold. Dont have a resistor box so i may use high impedance injectors from OBD1-2? Whatever is cheaper.

Hi bro, Im looking for the oxygen sensor wire, what I know is that comes from the distribuidor wires, can you tell me what color is it please? I want to connect it to the Oxygen sensor because the wire is hanging

This video is great, I have some questions maybe I missed it but you still keep the original engine wiring ? You just add the resistor box and injector wires?

Great video, so I did this swap on my 91 dx hatch .. the only thing is I’m getting a weird metal rattle like if something is making contact any idea?

感謝你的教學～照著你的方法我成功了😃不過電腦我用PM6－N10 會亮引擎燈

Hello, hope is good. What harness did u uses. Can I use my d15b2 Mt harness and do the swap like you shown on my d16a6 engine?

I'm using a y8 manifold and I need help. There is the red hose from the charcoal canister and I dont know where to put it.

Great info. I am swapping a B16A into my CRX DX. Is this wiring guide applicable for the B-series MPFI engines as well?

For the distributor I can just buy the adapter harness and not have to worry about the wiring you showed that leaded to having to wire those 2 blue wires correct ?

hey have you ever done a cank seal on an ef? I'm trying to but can't get the crank pulley off, and there is no way to get a pulley remover on it, and I haven't seen any videos that are ef specific

So I followed your video to the tee but on my DX harness the distributor wiring is not orange it is white do you have any ideas why. And under the dash it was missing the B12 wire the white and red wire so im very confused any help is appreciated

I have a question you mentioned in the video you know your ECU is working when the red led light in the ECU blinks when you turn your key to accessory mine doesn’t blink does that mean my ECU is bad?

Having a very hard time de pinning the connectors on the B and C connectors. Any tips on how I can find the clip? I’ve tried watching the angle that you find and I feel like I just keep going past the clip.

Question: I'm using a 91 crx si (d16a) engine harness on my 91dx Honda wagon. All the plugs matches but the last plug that plugs up to the firewall. What can I do to make it work? Help!

one of my distributor plugs doesn’t line up with the harness, its the big circle one. Any way to pin it out?

I've got some questions. what resistor box was used? why was the throttle cable changed and do what cable? is this all wired to the stock ecu? and if I swapped ecus for say a head swap or full engine swap would the wiring still be to the same pins or different. thanks! edit: also what fuel line was used? is this all just parts off of the si model crx and hatch?

I have a 1990 DX Civic Hatch with a H22a swap. I’m having a Code 4 being thrown and the car does not like to rev up. I switched C1 to B10 and C2 to B12 just like your video shows, but I’m thinking I need to put them back how they were originally? Any help will be appreciated I cannot figure this one out I’ve tried everything even new distributor and checked my wiring over and over again.

How did you find the mpfi plug for the dizzy? I’m having a hard time finding one for my b series swap in my 1991 ef hatch

I did this swap and got a new dizzy the car runs but it’s hard to start and goes into limp mode it acts like it’s off but I’ve checked everything what else could be wrong

I’m trying to swap a b20 vtec motor into my crx. If I did what you did would it be like a plug and play? The motor is a obd2 but heard it be plug and play for obd1 harness also. Not sure if I’m correct or not.

well in nj the honda vultures always pic them clean its rare to find one out here i will make a short video i need u to check out your reponce would greatly be appreciated im a big fan of your channel thanks for the great detail in your videos the video will be posted in my channel

If one were to use OBD1 parts how much extra hp could be coaxed out of a good tune? Or is it worth the extra trouble? I have my choice (i have both distributors and ECUs) of OBD0 or OBD1. I would have to buy the harness and have the ECU chipped.

going to attempt to find what i need tomorrow morning. Resistor box and pigtail, injector wiring, distributor plugs.

Is the pinout of the round connector of OBD0 MPFI Civic the same as that of OBD0 integra?

hey jon do u have a spare civic dx cluster my fuel guage needle was broken when purchased the car ive heard i can use an integra cluster but not 100 sure bout it

wow excellent work! , now i get an idea of how are the vacuum lines in the intake. i got a mess in mine

Great video, ive watched this 30 times and when i did my MPFI swap it felt like ive done 10 of them already, so thank you very much :D But i have 1 problem, where do you connect the bigger hose coming from the charcoal canister?

So this is for doing a dx harness. To put a obd1 plugs on. That’s the same what I got the small square 5 wire on the harness. Would this work if I add obd1 plug ins cause I wanna add obd1 dizzy

Hey guys I dropped a d16y8 into my ef hatch , it had a d15b1 got it to run but had an idle and Later noticed when using the d15 harness and intake manifold there’s a part on the IM that isint blocked off any ways I can resolve ?

Hey Jon what do you recommend lowering springs or coilovers

I have a wire from my harness that I don't know where it goes. is there a way I can't send you a picture or anything to find out where it goes??

I have a quick question, i have an obd 2 motor and my car is obd0 can i just replace the distrubitor with an obd0 one for a b18? i also dont want to wire the 4 wire 02 sensor and was wondering if i could just swap the 1 wire off my d16b?

Hi garage built Hondas I need some help for my 91 civic si intake manifold is making a loud whistle noise when I accelerates. The car drive smooth and it idle fine but when I accelerates it make a loud whistle noise I don’t know is it leaking one of the hoses, gasket or what, need some help

Do i of to change my distributer

Hi John, i did my swap because of your video. Very easy to follow specially the wiring part. But i have a problem when i tried to start the car. My fuel pump is not priming. I change my main relay and still not working. So i tried to put back the pm5 and the fuel pump is working. But i didn't totally start the car because i don't know if the pm5 will work. Do you think that i have a bad pm6 ecu? I checked the circuit board and it looks good. And do you know how to check if the ecu is bad? Sorry i have a lot of question🤗 i just want my 1988 ef sedan to work. Thank you.

Where you get the pigtail for the distributor

tried to do the conversion but I ran into a little doozy I bought a d16a6 dizzy and the wires I have are 2 blue/green, orange/blue, white/blue, green/yellow, orange, white wires which wires go to which I'm confused

Probably the wrong place to ask this question but I want wondering if it just had to be a a6 intake or could it be from a b series also can't find an a6 anywhere but have access to any b series intake I could think of

I am new in this if you don't have the TPS conected the car will not start ? Oh and thanks for all your videos you are like the Joda of Honda.

Hey quick question can u use a 90 93 da distributor to do this?

Do I need the injector resistor box for obd2 injectors or no

I need to change my distributor for mpfi or i can use the same that i have?

Would this work with a z6 intake manifold on a d15b2?

Hey Jon so everything on my LS works except for my injectors there's fuel to the rail and I have spark just not the injectors aren't shooting any advice

Hey Jon, just recently completed an MPFI conversion on my '90 Civic Hatch. It idled a bit rough at first, but started driving okay. After about twice around the block it started breaking up, the CEL came on, and it had a rev limit of about 3-3500k. Got it back home alright, CEL was only code 4 for crank position sensor. I tripled checked the wiring at the distributor pigtails and ECU harness. All seems good in the wiring. Tried a reman'd distributor, it was fixed for about 2 blocks and then the exact problem came right back. Third distributor lasted about 2.5 miles. Replacing the distributor seems to fix the problem until it's driven for over 10 minutes. Any ideas?

Do I have to T the hose coming from the iacv?

I have a 1989 HF that was b15d7 swapped but it still has the pm8 ecu should i replace it with pm6 to take advantage of the MPFI

the intake manifold gasket doesnt need to be sealed right?

Hey man cant find the injectors on my 1991 civic DX mine doesnt have that PGM

What throttle cable you use ?

Can you remind me which throttle cable and which fuel line you used?

Hey if you've still got that automatic intake i'd be interested in taking it off your hands.....

Can you do a battery termimal bypass video? Or how yours is hooked up?

who can help me with my swap my d15b2 dp blew up. im trying to put in a d15b8 i have a p05 ecu, obd0 to obd1 jumper harness any help would be great

Swapped ecu obd0 switch resistor box switched injectors Switch injector clip 😒😒 need help

Damn bro my car won't start can u help me out. Seems it not getting any spark black yellow wire is getting power from ignition. Swapped dizzys my friends work. The b10 b12 and c 1 c2 wire are in place. But the cut and splice every wire to an obd2b dizzy plug. Not sure if they mess the wiring up. Any help would be great thanks

If I'm putting a whole d16y7 motor in my 91 civic std would I use the pm6 also for the dpfi to mpfi conversion?

i have a 91 crx si complete but the d16a6 engine is bad found a 15b2 dpfi ..need help wonder if its similar even tho i all ready have si ecu intake an all?

Does it work with PM5 ecu's. ? Thanks

Where are you from? I want purchase this items

Hey man I’ve been wanting to get into the Honda crowd and I found a good deal on a 1990 hf hatchback it’s a 4speed and has 70 HP I want to do a b20 swap but I really suck at wiring would you be able to sell me wiring harness? I’m pretty sure I can do the swap if I can get the wiring harness. If you have any tips or advice let me know this will be my first project car and also keep up the great videos

I have a 1991 hatch dual point, i am going to convert to full injection with a p06 intake. We're can I order online the fuel hose?

Hi jon, my name is nick and i have a 91 civic hatch that i have converted to mpfi looking at your vids. I have bought a distributor and a step up harness to run a obd1 ecu. I have done everything in your vid plus research. Im getting a code 4 and car shuts off. Please help if you know of anything that can be giving me problems. Thanks man.

Does an 88 crx distributor fit an 88 civic dx?

I’ve got a engine and intake out of a 95 dx what do I need to do to get it in a crx up and running

Its the same if it a auto tran too or no ?

Did you hook up the charcoal canister or no

Where does that white/red wire lead to?

I put everything on and I'm getting a tdc code how do I fix that

Now what was the benifit of this swap again?

Make a video on how to delete ac on a ef

why you need to change the distributor?

I just did this but my car wont rev past 5k rpm

No I'm not I'm using a z6 intake with a y8 tb

i know sorry man

Hey john I got a s20 transmission from an eg I wanted to go hydro on the ef and also do the dual to multi point conversion..is the wiring different for the trans?