Hey guys...new here, just got a quick question, i have a 88 dx hatch...i am doing a mpfi swap, just wondering if i can use the stock harness and just wire additional stuff in? and can i use my dizzy for the swap or is it a must to get si ones?

i have the manifold, resistor box, and fuel rail i also have a z6 dizzy, and a dizzy off a d15b7....how should i go about this really need help and i already searched, cant find this answer, please help.......thanks!!!

 

its best if you have the crx/hatch si harness it makes it alot easier. i'm in the process of doing the same thing and all i'm lacking is the harness. good luck finding one i been searching everywhere and cant find one thats not all cut up.

 

You didn't state what exact parts you are going with so I'm assuming you are going to be doing the DPFI to MPFI and replacing your DX ECU with the 88~91 MPFI ECU.

You MUST use the 88~91 Si MPFI dizzy becuas your DX DPFI dizzy can only control 2 injectors and not 4.

You can NOT use the Z6 distributor or any OBD1 or OBD2 distrubutor with an OBD0 ECU.
They send differnet pulses to the ECU and it won't run.

You should use the stock harness as it will be FAR easier than trying to make the Si one work. Si harness plugs and pinouts are not compatable with your DX cabin harness.

BTW: search for DPFI to MPFI. It's been covered many times so I'm sure you will find all parts lists and additional details you need. If you have any additional questions then post back - I'm sure people will be more than happy to help!

 

^^^^

woah back it up. so you can use the stock harness. dont mean to flame your thread or nothing but, i've always been told you have to use an si harness cause its already set up for mpfi. so what do you do just wire in the other two injectors?

 

nevermind i just found it in the faq.

http://www.geocities.com/teampimports/fuelinj.html

 

all right....thanks for not freakin out like most ppl do in forums, lol. ill see what i can do!
thanks again.

 

you can use a si harness. Its just a big pain. Repinning needs to be done on the shock towers and the driverside shocktower needs to be changed.

 

okay....so im just gonna go with the pm6 and a dizzy and i should be good to go! i found a write up aswell......

 

Blaa blaa blaa
Search...!

http://www.angelfire.com/d20/hcivic88/dx-siwiring.html

 

Or...

http://rywire.com/store/8891-crxcivi...52a8d9a60c99bd

 

i have so much honda stuff layin around, can i use a p06 ecu? i have the dizzy for it and wiring harness! it all came out of a 92 5 speed dx coupe, can i cut the injector plugs off and wire em into my harness? and i do have a jumper harness!......trust me ive been searching so please if ur not gonna help then just don post please i dont need to hear it.......thanks!

 

Ok not trying 2 be a ****
Use the parts that belong 2 the motor

If its a z6 head get the vtec dizzy cause the none v dizzy the legs are diff and they won't bolt up..

If the motor is a vtec motor use the (p28 ecu)
If its not then (p06)

If ur gonna use a jumper harness obd0-obd1.
Ur gonna replace the injectors plugs to obd1 plugs...
then take off the resistor box and soder all those wires together ...

 

okay...gotcha, im not usin the z6 head yet! its the stock d15b2 just usin the z6 mani for now.....so im just gonna soder the wires from the injectors together then, (yellow/black) !

 

ok...got a question that i cant find an answer to! On the old dpfi harness theres two injector plugs (brown) and (green) the brown has a red wire and a yellow wire, the green has two yellow wires.....i know i need the red wire, do i also need the yellow wire off the brown plug? or use a yellow from the green plug??? someone help me out please!!! thanks.

 

anyone????

 

the answer to all ur question..........http://www.angelfire.com/d20/hcivic88/dx-siwiring.html

 

on the green plug, one of the wires is yellow - it goes to injector #1 - the other wire is yellow with a black stripe - it goes to the injector resistor box - the red wire on the brown plug goes to injector #3 - the other wire is yellow with a black stripe - it also goes to the resistor box

 

so ive searched around.....and i cant figure out where the blue/green and blue/yellow wires go from the dizzy, its obd1 and i have a p06 ecu, theres no wires that color on my obd0 stock dx harness......help !

 

this is because the mpfi and the dpfi wire colors are different u will have to use the distributor plug from the si harness that u should be using as a donor harness look at this diagram carefully.....

goodluck

 

well i dont have an si dizzy or harness, so what should i do?

 

try 2 find 1 on the h-t market place ask around. also u could use a dpfi female dist. plug and re pin it. im not sure but i think the ls dist. plug might work. ask around im not really sure

 

ok....i have seen that diagram, but what about with an obd1 ecu? is it the same???

 

if u look for montech harnesses on ebay u could buy everything u need, but to run a obd1 dizzy u would need a dist. jumper sub-harness. but it would cost around $200 easy all together harness obd1 dist. harness. but if u run a obd 1 dizzy then u would need a obd1 po6 ecu or any other obd1 ecu. so ur gonna have to change the ecu regardless. either obd1 p06 or a obd0 pm6

 

okay....well i got my car running today, it starts fine but it runs kinda ruff for like 15 seconds then just dies,then when i try to start it again it wont start im throwing code 14 and 18, and another one i dont know....its on long flash a pause and another long flash.....any ideas???

 

i bought a 90 civic a year ago with this mpfi swap done to it and i had a hell of a time getting this thing to pass deq.i tried tuning it myself with no luck.i talked to the owner of urban imports about it and he said that he had done some of them but it was always a bitch to get it passed.so i took it to rrev and jeff looked at and he could not find any problem with how it was done.pm6 ecu with modified harness and si dist.he could not get it to pass.so i live in washington where you can take it to a certified shop and if you spend 200 dollars to fix it and it does not pass they will give you a waiver.so they got it close to passing but i ended up with a waiver.so i have a year left to fix this thing.all three of these shops say that you can not turn the si dist far enough to get it in tune to pass deq.so im asking you guys your experiance with this swap passing deq.i have heard that it will pass in oregon because they dont run the car on a roller.so this leaves me with doing a mini me or swaping in a z6 all together.any help here would be great.i have read all the threads on this mpfi already with no mention of tunning the thing to pass deq.