ok so this engine's going out on me so my really koo friend;s gonna let me have his old si engine. I bought the si hardness and now people are telling me that i need this other connection because the hardness wont just plug in. As you can tell im new at all of this so if you guys can help me out on this.PM if u have any info on this.thanx alot

 

rywire.com

 

you could wire it yourself search mpfi. you have to convert your dx engine harness to use 4 injectors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by e jay one &raquo;</TD></TR><TR><TD CLASS="quote">you could wire it yourself search mpfi. you have to convert your dx engine harness to use 4 injectors.</TD></TR></TABLE>

Yeah it isn't hard I've done it atleast a dozen times.

 

hey do u think u can give me some tips on how to do it, cause i dont know noone that can acctually do it.or if u know a place that would tell u the directions that would b nice.thanx

 

Whatever you do, DON'T try to swap the complete SI harness. This is the hard way.

 

so theres an easier way??? cause one of my friends wants to do that but i wasnt sure about it

 

MUCH easier is to keep the DX hareness and make changes where necesary (ie adding wires for adfditional injectors, etc.).

 

Do this http://effinmotorworks.com/Effin_MPFI_swap.htm

 

thanx u guys u guys really help me here

 

I swapped a MPFI Si engine into a DPFI CRX. I dont see why you guys say it needs all this fancy wiring if you just swap the engine harness, dash harness and ECU. Thats essentially all the guts from the Si donar car.

For some reason the fuel pump and gauges dont work but the car runs fine when we hard wired the fuel pump. Maybe this type of swap is related to my problems. Does anybody have any ideas?

https://honda-tech.com/zerothread?id=1397689

 

one of koolest friends gonna help me out and he saids its better if i make the whole car si...hes thinking about changing the interior wiring and the ecu and the fuel pump and well mostly verything... what do u guys think???

 

too much unneccesary work for what you get out of it. just do the mpfi conversion on your dx harness and you will be fine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">I swapped a MPFI Si engine into a DPFI CRX. I dont see why you guys say it needs all this fancy wiring if you just swap the engine harness, dash harness and ECU. Thats essentially all the guts from the Si donar car.</TD></TR></TABLE>

From the horses mouth : That's the worst way
It's much easier to do a DPFI to MPFI conversion on the DX harness if you know what you're doing. And if you don't, for $160 you can have it done for you. Which is worth the time if you're busy, and certainly worth the troubleshooting if you don't quite understand what you're doing.

 

I dont see how you guys can say its more work. If your doing an entire engine swap, swapping the engine and dash harness is not much harder. Running new wires and re-pinning **** leaves alot of room for error especially for the novice.

My way is plug and play.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">I dont see how you guys can say its more work. If your doing an entire engine swap, swapping the engine and dash harness is not much harder. Running new wires and re-pinning **** leaves alot of room for error especially for the novice.

My way is plug and play.</TD></TR></TABLE>

changing the DX harness to MPFI takes about one hour. You change around about 4 wires and you're done. Changing the engine harness requires you to take the dashboard apart, unattach every connection, get a new instrument cluster (as the SI cluster is different) or you can just rewire your existing cluster to work.

You tell me which one sounds easier. Change four wires, or unhook every connection on your harness, including the zipties and those damn little plastic things that hold the harness in place that NEVER come off without cutting them. If you do the DPFI-&gt;MPFI conversion you just swap it in, one two three.

FYI, you're going to have to change the ECU anyway if your'e going to MPFI. you'll also need a new distributor, and the injector resistor box.

Here's a how to:

http://www.gutterslide.com/fou....html

Don't feel that you have to do the SI harness just because you already own it. You can easily sell that crap on ebay.

 

Its more than 4 wires....you need to run two extra injector wires to the ECU and all of the injectors to the resistor pack...but its not that hard if you take your time and carefully doublecheck everything each step.

 

Well typically you're going to pay $100+ for a whole uncut CRX Si chassis harness on ebay, or a junkyard, and it must match your year (88/89-91) not to mention if you got a hatchback harness instead of a CRX harness, it will never work.
You just don't know for sure when buying harnesses on ebay...
OR
You would leave the junkyards after spending a few hours pulling it, spending $50+ at the door, then having to go home and install it. Not to mention how beat up junkyard cars are, you'll probably have a cut in that harness somewhere.

sure sounds like $160 is the way to go.

I argue my point because i don't want people to start thinking it's easier to install a Si harness, i have countless customers calling with CRX/Civic's that cut out their DX interior harnesses because "they didn't think they needed it" - low and behold, the SI harness they got, doesn't match their model and they have to start from scratch. These are the people that never get their car running and sell it eventually. I don't want to hear any more horror stories based on misinformation they heard online

DPFI to MPFI is so well documented, because it's the better way.
Where's the "replacing your DX chassis harness with a Si chassis harness" Write-up??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NikoZai &raquo;</TD></TR><TR><TD CLASS="quote">Well typically you're going to pay $100+ for a whole uncut CRX Si chassis harness on ebay, or a junkyard, and it must match your year (88/89-91) not to mention if you got a hatchback harness instead of a CRX harness, it will never work.
You just don't know for sure when buying harnesses on ebay...
OR
You would leave the junkyards after spending a few hours pulling it, spending $50+ at the door, then having to go home and install it. Not to mention how beat up junkyard cars are, you'll probably have a cut in that harness somewhere.

sure sounds like $160 is the way to go.

I argue my point because i don't want people to start thinking it's easier to install a Si harness, i have countless customers calling with CRX/Civic's that cut out their DX interior harnesses because "they didn't think they needed it" - low and behold, the SI harness they got, doesn't match their model and they have to start from scratch. These are the people that never get their car running and sell it eventually. I don't want to hear any more horror stories based on misinformation they heard online

DPFI to MPFI is so well documented, because it's the better way.
Where's the "replacing your DX chassis harness with a Si chassis harness" Write-up??</TD></TR></TABLE>
its not like i had a choice...the car i bought is a dx and the chassis harness was hacked beyond repair...i just happened to find an si chassis harness....the harness needed to be swapped anyway...so why not already go for one that had mpfi wired into it from the factory

 

i just did that same with my 88 dx u will have problems with the dash plug the si ne has i think 17-19 wires going to the dash and the dx has only 11-12 so u will have to pin the out and match the ones that u will need so ur dash still get at least gas, temp and rpm's readings.... u will end up with about 6 cables that u wont fidn a place for,,, not to mention that ur flasher and turn signals will have to be rewired or jsut get the plugs from the si at the junk yard.... im still on the process of finishing up my swap (b16a) and it really gets a lil complicated trust me.... but u will get it jsut put some time into it...

 

take out the dx harness and send it out to rywire, or hasport.

or do it yourself. that guide that was posted is very complete...

 

the chassis harness replacement is a cake walk.. took me probly 20 minutes and solved two months worth of problems for me.