djcaseanova

Alright, discovered my harness did not have a wire at B10 in the ecu plug. This is a problem because I can not cut and splice. I have to re-pin it. Okay gotcha, but that will leave me with nothing at C1 ecu if I take that pin out. Where the hell can I get a ECU pin without having to buy a whole new harness??? I have to get a pin because there is another wire that needs to be spliced into the C1 spot. Also, the wire at B12 is white/red and this is supposed to be spliced to C2 is this correct?? I did a search with no luck on finding anyone else with this problem. Thanks for your help!!!

manson

http://tech.hybridgarage.com/t...g.htm

try that site. i think your instructions are wacked out or your reading them funked up. b10 is supposed to be empty and your just cutting and swaping 4 wires around on the ecu side. read those instructions and do a search under mpfi swap on honda-tech or yahoo or google. you'll find the info

i just did this swap its tough, but you just need to take it slow.

djcaseanova

Well, at those locations where that site says there is extra pins, there are wires running into the engine bay and under the dash. Where the B12 is there is a white/red wire that is also running somewhere. I can't trace them, but they are not "extra" wires/pins they go to something. The only places that DO NOT have pins or wires in them are B9 and B10. I have no extra unused pins anywhere in the harnesses. I have a 91 Civic Hatchback DX and strangely, it is by far not the same as others as I have discovered obviously. Unfortunately, I can read directions, but when my things look completely different than everything I've seen, that's when I start to worry. I have searched and searched and been to every forum/website with this info and can't find anything.

djcaseanova

Anyone??

ShiroX

take pins from B2 and B11 the are not used or needed

cut c1/orange c2/white

c1-->b10 c2-->b12

now c1 and c2 should have a stub coming from them add wires to them and extend them into engine bay

cut wires at a3 and a7 and add wire and extend into engine bay


Done with ECU SIDE

Now Engine Side

Swap the two tps wires green/white with yellow/white

Wire the two yellow/black wires from the DX injector harnesse together and run it to the yellow/black wire on the injector resistor box.

Connect the yellow wire from the DX injector to the #1 injector (brown wire).

Connect the red wire from the DX injector and run it to the #3 injector (blue wire).

Connect the A3 wire to the #2 injector (red wire).

Connect the A7 wire to the #4 injector (yellow wire).

Connect the 4 red/black wires from injector resistor box to each injector.


Now onto the Distributor

Connect C1 to blue/green wire on cylinder position sensor plug.
Connect C2 to blue/yellow wire on cylinder position sensor plug.

FINI!

http://tech.hybridgarage.com/t...g.htm

my source...use it and pass it on

djcaseanova

Right, I know what to do, but the posts are that there are already WIRES at the locations B2, B11, AND B12 that lead to something under the dash. Are these wires just to be cut or what?? The engine side has already been done, my problems are at my ECU harnesses because of those pre-existing wires on the plugs. Again, my problem is that I have NO unused pins, and the spots B2, B11,B12, have wires, and I need an extra pin for swapping C1 to B10 and then something (another pin) to go to C1 to wire it up to the distributor wire.
I need to make sure that the wires at those locations, b2 and b11 and b12 are just wires that aren't needed. Thanks guys!!! I hope you guys can help.

BTW, all the links you guys are telling me to go to do not mention anything about pre-existing wires at these locations where i have wires at on my STOCK harness, note these wires i did not put there myself.

ShiroX

dood you need to read more carefully instead of scanning

"Unused pins can be taken from B2 or B11. Some models have a wire located at B12."

says it on step one of the write up

djcaseanova

you are not reading what I am typing man... the PINS at B2 and B11 are attatched to a wire, those wires are run into the engine compartment and into the harness. I am not about to go chasing those wires. As for B12 it goes to the AC connection at the AC control unit harness/plug.

I appreciate you being patient...

ShiroX

How do you know where b2 and b11 run to and how do you know they are needed

obviously theres gonna be wire coming from b2 and b11 for you to be able to use them in your MFPI conversion

I believe 100% in Kenjis Conversion instructions as it has never failed for me

if his instructions sat this pin locations are not used or are not important then i dont see what your stressing about

if youre worried about loosing some functions or sensor wire then go to the junkyard and cut yourself out some ecu plugs and take some pins from there and add them to your harness

Blaze45

If you think that the pins go somewhere (they dont) go to the boneyard and get a new pin....

Blaze

manson

a ton of people have done this swap on this site and everyone has used the same dam instructions. those wires are NOT USED. just listen to us and do what the instructions say. just cut them.

if you really want to see where the wires go buy the Honda repair manual for $200.00+ and read the schematics.

kagegod

Are you POSITIVE you are looking at the right plug on the ECU? If you're looking at the wrong plug it is very feasable that you are looking at the wrong plug or looking at the plugs the wrong way...

djcaseanova

Alright, had to call a friend at the dealer since you guys aren't believing what I am saying, he brought me over a Helms (pro. service manual) their wire diagram reads as follows, I verified by tracing 2 of these connections, one I could not find in the mess.

B2 - Runs to the A/C system under the dash (as stated in helms)
B12 - Runs parallel to B2 also runs to A/C system (as stated in helms)
B10 - says it runs to Tandem Valve Control Solenoid Valve whatever the hell that is

I happened to notice Honda of Canada markings all across the stock ECU when I came in and looked at it as well as along the engine bay which I didn't notice before. I would have assumed them to be the same as USDM Hondas, though the ECU is still a PM5

kagegod

What is your car?

djcaseanova

91 civic DX hatch

kagegod

That's strange that it would be different...I don't know why it would

djcaseanova

I came across another post on the net about a guy having a similiar problem, but he had a completely different ECM. Mine is a PM5 which I believe to be the correct ECM for the car, it hasn't been changed that I know of and there isn't any modifications that seem to have been done to the wiring before I got down there.

FOR THOSE WHO DON'T LIKE BEING WRONG.... OR don't know what I am talking about... here are some pictures.

Blaze45

Why dont you just buy a pin from someone on HT usdm fourth gen vtec sold me like 5 for 2 bucks or something....

Blaze

Grease Monkey

Good info to know.... hope someone will help this guy out. I plan on doing my mpfi swap soon and hopefully I wont run into this problem or I will be prepared for it. BUMP!

djcaseanova

I have been looking for just the pins, but no one is willing to sell, nor can i find them at any junkyards, etc.

Grease Monkey

I have pins.... I actually have ECU harnesses just the connectors. Maybe if you can pull the pins out and solder the pins on new wires you can fix your problem?

djcaseanova

i was thinking... for testing purposes, could I use insulated terminal connectors at the ecu, making a connector that would allow me to test the harness after i cut those wires, thus saving the pins on B11 AND B12 in case I have to rewire it back to stock?? I am asking so that this way if the ECU throws a code or something then I would be able to repair it or convert back to normal. IF it works, then go back and solder the connections?? Lemme know... thanks!!

88DXCRX

If you need a couple of pins with wire still attached,
Drop me a pm.I'm in Dallas..

ShiroX

on your dx ecu PM5 those pins may have some importance but on the pm6 those slots are not used for anything so even if you keep the wiring there it will not read anything

go to your honda people and ask to see the pm6 ecu diagram there is nothing in those pins

but like i said again just get some pins and stick them in there

djcaseanova

Cool... I am in the process of trying to get some pins.... I'll try that.