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DPFI To MPFI conversion

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Old 02-23-2010, 02:55 PM   #26
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Default Re: DPFI To MPFI conversion

Back from the dead. Just google dpfi-mpfi conversion. It is pretty easy.
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Old 02-23-2010, 02:57 PM   #27
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Default Re: DPFI To MPFI conversion

anyone got an idea on where to buy a dpfi to mpfi harness already converted for a decent price?
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Old 02-23-2010, 02:58 PM   #28
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Default Re: DPFI To MPFI conversion

tried cant find anyones that i like
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Old 02-23-2010, 03:00 PM   #29
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Default Re: DPFI To MPFI conversion

Dude, This is my last post on this topic but why would you pay a lot of money for something you can do? This is not a hard job. Just read up, grab a soldering iron, get some wire and attack it.
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Old 02-23-2010, 03:03 PM   #30
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Default Re: DPFI To MPFI conversion

we have we cannot get spark read and reread every diagram we can find repinned and rewired the harness about 10 times even put it back to stock it just will not get spark and yes all the parts on the car are right engine ran fine wehn a pulled it out of my other car im just done with messing with it and want to buy a converted harness already done.
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Old 07-24-2010, 05:20 PM   #31
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Default Re: DPFI To MPFI conversion

ok i got the fuel injectors to ecu down packed....but i dont understan where the tpc wires up to....where exactly do the sensors wire up at????what color r the wires that they wire up to????
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Old 07-24-2010, 09:14 PM   #32
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Default Re: DPFI To MPFI conversion

mpfi in a d15b2 basically makes it a d15b7

better fuel economy, better power

run new wires for the injectors, switch the outside wires of the tps or map (cant remember and drive!

If you use an SI or HF harness, it will NOT plug into the strut tower plugs unless you re pin them
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Old 08-22-2010, 12:53 PM   #33
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Default Re: DPFI To MPFI conversion

So Im doing a d16a1 swap into my 1991 ef that had a d15b1. The motor started and only runs on cylinder 1. I'm a little unsure of my wiring at the ecu so I was wondering if anyone knew a good write up. I've been searching and all the links I've found are dead links and I just need a good write up maybe even with pictues. I know people are sick of this topic but this is my last resort
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Old 09-26-2010, 09:28 PM   #34
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Default Re: DPFI To MPFI conversion

i am doing the same swap to my d15b2 converting it to mpfi and got a question about it. For the harness do i have to use the harness for the b2 or can i use a different harness that already has the mpfi as long as it aint vtec and obd0?
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Old 09-27-2010, 08:36 AM   #35
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Default Re: DPFI To MPFI conversion

Problem is, this conversion is a two part process. First is modifying the dpfi engine harness, and second is repinning the ecu plugs. So no matter what, if you send the harness out, YOU will still have to pin the ecu plugs. I can do the first part for you. If you send me a money order for $100 and your harness, I will ship it back to you already modified for mpfi, as well as instructions on how to repin and where to repin on your ecu plugs. Also, all the modified wires come labeled and vtec can even be added for a later swap. PM me for more info.
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Old 09-28-2010, 03:02 AM   #36
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Default Re: DPFI To MPFI conversion

you really only have to repin 2 wires the other four are cut and ran to other things...
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Old 03-25-2011, 03:22 PM   #37
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Default Re: DPFI To MPFI conversion

any D series MPFI intake mani will work on this right?
i need to do this conversion to put a b16a2 into my ef.
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Old 03-26-2011, 11:47 AM   #38
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Default Re: DPFI To MPFI conversion

ok so Im subscribing to this.. just went today to start grabbing parts for this swap. I got the following:
harness and resistor box(strut tower to strut tower) from a 90 lx sedan auto
intake and throttle body w duct to filter and support bracket
throttle cable
fuel line
2 ecu's 1-ps9 from the lx and 1-pm6 from a si crx

I know im missing the 4 injectors so need the size or something else they can be found in and the dizzy which is different than my d15b2 correct?

what else parts wise am i missing?
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Old 03-29-2011, 12:09 PM   #39
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Default Re: DPFI To MPFI conversion

You can use the injectors off of any 88-91 Civic that is MPFI or a 90-91 acura integra or i believe the first gen integra 86-89 but im not positive.

I also have a question about this swap. I have already done this on my hatch but i cant remember if i switched the wires on the tps so i was wondering if anyone could tell me how it would run if i did forget to do it.
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Old 03-30-2011, 07:20 AM   #40
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Default Re: DPFI To MPFI conversion

Sorry to sound like a total noob, but if your doing an engine swap (B Series, DOHC ZC) in the EFchassis, all you need to do is the wire the car up to be MPFI? I was under the impression you would need the IM, Fuel rail, and whole lot of other parts, or this only if you want to keep the original motor?
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Old 03-30-2011, 12:29 PM   #41
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Default Re: DPFI To MPFI conversion

If you are swapping to a B series you will need d to b series mounts, the complete motor, and all the emission control devices for that motor and you will have to do a DPFI to MPFI conversion if it is not already an Si.
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Old 03-13-2017, 11:41 AM   #42
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Default Re: DPFI To MPFI conversion

So I tried to convert my 88 honda civic hb dpfi to mpfi and it wouldn't start so I put the dpfi stuff back on and it still won't start up now it only turns over and that's it
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Old 03-13-2017, 12:23 PM   #43
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Default Re: DPFI To MPFI conversion

Quote:
Originally Posted by Chris88civichb View Post
So I tried to convert my 88 honda civic hb dpfi to mpfi and it wouldn't start so I put the dpfi stuff back on and it still won't start up now it only turns over and that's it
a multimeter is about to be your best friend
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Old 03-13-2017, 12:40 PM   #44
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Default Re: DPFI To MPFI conversion

OK and I've been talking to someone and he told me that my civic is out of time and that I should losen up the dizzy and have someone turn the engine over while I turn the dizzy until late it fires up
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Old 03-13-2017, 12:45 PM   #45
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Default Re: DPFI To MPFI conversion

Quote:
Originally Posted by Projekt_Ef9 View Post
You can use the injectors off of any 88-91 Civic that is MPFI or a 90-91 acura integra or i believe the first gen integra 86-89 but im not positive....
You can use any injectors that fit and have the correct flow rate to match your ECU.
It doesn't matter if they are low or high impedance.
88~91 era are low impedance and require an injector resistor box.
92~? are high impedance and work perfectly fine and do NOT use the resistor box.
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Old 03-13-2017, 12:48 PM   #46
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Default Re: DPFI To MPFI conversion

I knew that about the injectors because I have obd2 saturated ones from a d16y8 and the intake mani but it still didn't start up did I have to set the timing on my dizzy and it would of fired right up
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Old 03-17-2017, 02:52 AM   #47
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Default Re: DPFI To MPFI conversion

My dpfi to mpfi drove me CRaZy....just like you mines had no spark. Followed instructions to a T...Then I noticed some mention wiring A15 to resistor box power wire. My car was an 88 dx, Must be an 88/89 Civic thing. Some say the solder the 2 dx black and yellow wires to resistor box works. Others say no, had to be wiring differences. Add a wire to A15 to resistor box. Should start up, A15 goes to main relay in dpfi. Read comments under this thread hit and miss with right ups.
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Old 03-17-2017, 04:23 AM   #48
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Default Re: DPFI To MPFI conversion

This seems to be one hot topic. Have never done a MPFI swap but just watched this vid the other day on youtube from Jon Widmer. Guy is pretty amazing and has a handful of 88-91's in his garage. LOTS of diy how to videos.

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Old 03-17-2017, 10:56 AM   #49
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Icon2 Re: DPFI To MPFI conversion

Anyone have a link to info on swapping a d15b(vtec) into the si chasi. I can only seem to find people doing it in there dx lx models and have heard its much easier in the si chasis since there mpfi already. TIA.
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Old 03-17-2017, 12:21 PM   #50
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Default Re: DPFI To MPFI conversion

There's no difference in mounting the engine in either chassis. One for one engine swap into an Si, add wiring for VTEC related components. Then figure out how you want to address the ECU. If you need help beyond that, use the FAQ and if still confused, please create a new thread.
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