I am doing a D16Z6 swap, and I am using the d16z6 intake manifold and fuel injectors... since my crx is a DPFI vehicle, How do I setup the injector wiring?

I dont have to use the injector resistor box, so can I just hook my two injector power lines to all 4 of the injector lines? (i.e. 2 ---> 4 all solder together?) will this work or do they have to have seperate power lines?

Thanks for your help.

 

there is a function called 'Search'

 

Really? thats funny I have been searching for this information using the stock injectors for a 92-95 engine which do not require an injector resistor box, and what do you know???? nothing.... Everything that I have found is on using a 91 si manifold with 91 si injectors and a resistor box... I am not using that setup. So if you happen to find this information in a search please feel free to let me know.

Appreciate your help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thumbtack &raquo;</TD></TR><TR><TD CLASS="quote">Really? thats funny I have been searching for this information using the stock injectors for a 92-95 engine which do not require an injector resistor box, and what do you know???? nothing.... Everything that I have found is on using a 91 si manifold with 91 si injectors and a resistor box... I am not using that setup. So if you happen to find this information in a search please feel free to let me know.

Appreciate your help</TD></TR></TABLE>

with 92+ engine you dont have any DPFI setups... that is why you cant find anything... even if you successful get the wiring right... you're fuel management wont even compensate when you hit vtec... im sorry to say but your engine will be running lean in fuel... and its not good of a upgrade if you are planning DPFI....


Modified by 92integra_gs at 7:04 PM 7/19/2004

 

actually there are plenty of topics on putting a 92-95 d16z6 motor into a 88-91 hatch or crx. If you need help, talk to me, i can help, this site is pretty much how i did my swap.

 

well if you want to use the injectors you have to convert from obd-o to obd-1 so just do the mpfi and add the wires it says on the swap but just use the injectors and also use the dizzy plugs from the z6 if it came with the harness.....BUT JUST USE THIS WEB PAGE ok http://www.geocities.com/chipm....html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thumbtack &raquo;</TD></TR><TR><TD CLASS="quote">Really? thats funny I have been searching for this information using the stock injectors for a 92-95 engine which do not require an injector resistor box, and what do you know???? nothing.... Everything that I have found is on using a 91 si manifold with 91 si injectors and a resistor box... I am not using that setup. So if you happen to find this information in a search please feel free to let me know.

Appreciate your help</TD></TR></TABLE>
this is just one of many. search a little harder.
https://honda-tech.com/zerothread?id=741555

 

I have the wiring needed to convert to mpfi without having to mess with your wiring harness just tap into the lines for the two injectors on the dpi. let me know if you want to buy.

 

Ok maybe I didnt explain this very well... I am converting my 1991 Honda CRX DX model which is a DPFI car, over to a MPFI D16Z6 Engine with the D16Z6 Intake Manifold, ECU, Injectors, and Distributor. I am not going to keep DPFI as that would be pointless.... I have been searching for how I should connect the D16Z6's OBD1 Fuel Injectors up to my car since I will also be using an P28 OBD1 ECU...

I have already ran the additional lines needed for the CPS, and the two extra ecu connections for the fuel injectors.... Now I need to power them[fuel injectors]... I just need to know if the injector power lines on the 1991 CRX DX are Fired individually or are they constant +12V lines... in otherwords, can I just solder the two Yellow/Black lines together and run a splitter to make four individual Yellow/Black Lines to supply +12V to each individual injector...

Since I am converting to OBD1 I shouldnt have to use the Injector Resistor box due to the fact that only the EF Model cars used Low Imp. Injectors.... after that I believe all the injectors are now High Imp.(this is my understanding, havent found out if this is true yet)...

I hope this explains my question a little better.


Please dont take my posts as being a dick , I have searched and searched and joined multiple boards trying to find some info on using all OBD1 equipment (i.e. Block, Head, Dizzy, Injectors, Ecu, etc. etc.) and everything I have turned up is mixing components from both the EF and EG models, something I want to stay away from as I just unloaded every dime I had on getting a hold of this engine as it was all I could afford and didnt want to pay for a B16a (as much as I really, really want one... just cant do it.)

 

Mr. Carpenter, I appreciate that thread, I didnt find that when I searched for that exact title of the thread as a search topic, did I maybe do something wrong with the search menu? It was, however not what I am looking for, as that is a very different intake manifold/throttle body, i haven't seen one like that before is it a crossbreed (ef/eg combined?)?

I have the vacuum lines all sorted, as well as all the wiring for the intake mani, just need info on the injectors, thanks for the thread though....

I still cant figure out why it didnt turn up when I searched MPFI D16Z6?


Nevermind, I realize now after looking at it the intake is sitting sideways.... my bad... I got the whole engine assembly already connected with all the vacuum lines included.


Modified by thumbtack at 11:13 PM 7/19/2004

 

You need to do the DPFI to MPFI conversion.

Since you want to go OBD-1 you will need to convert to OBD-1 AFTER you have done the DPFI to MPFI.

You can save time by converting to MPFI and then just getting the OBD-0 to OBD-1 jumper harness (like the one made by BOOMSLANG) and you'll be set to go.

As far as components, you can use everything from your OBD-0 setup and just use the 4 wire O2 sensor and distributor for OBD-1.

You can use high impedance injectors without the resistor box OR low impedance with a resistor box (resistor box make the imedance go up) for either OBD-0 or OBD-1.

EDIT - and as far as searching goes on this site, you need to try the currently active content as well as trying the archived content. There is button for it on the right side. Don't search very detailed... the search function is pretty weak.

 

http://www.deepstaged.net/dxtosir.htm

there you go.. at least what you are saying is making sense now... good luck...

 

http://www.hondata.com/techinjectorwiring.html

i thought this one might be exactly what you needed....

 

http://www.fourthgenhatch.com/mpfi.html
this is a good write up on DPFI to MPFI

 

ok I have read everything over, but I am still worried about the fuel injection wiring... the wire diagrams are nice and I have been all over fourthgenhatch.... first place I went to.

I just want to make sure that I dont have to use a resistor box, did the del sol or the civic from 92-95 use one? cause if they didnt then I shouldnt have to.... I just dont want to fry the injectors the first time I turn the key.

If someone can give me a 100% no resistor box needed and all I have to do is connect my DPFI injector harness power lines to all four injector power lines I will be a little more at ease in my mind.

Thanks for all the responses... And when i search should i be really vague on what it is that I am searching for? when ever I search specifics I dont get very many hits.

Why does my mouse icon say MOO at this site.... is that normal

 

if there grey plugs then no freaking resistor box ok damn and if there white then you need the damn box man yo u need to learn your stuff before u get into it so many people answered your question!!!

 

easy peasy lemon squeezy! But you do have a point about doing some research. Honda-Tech is not the only thing on the net that has a search function. Google is one of my good friends when it comes to car questions. USE IT!!!

 

You know what I have asked one simple ******* question.... Can I wire up my two Yellow/Black Power lines from my dx harness to all four of the D16Z6 Yellow/Black Wires...

Everything I have gotten is somebody elses way of doing a DPFI to MPFI Swap using a CRX Si Intake Mani and a resistor box....

I dont need to be involved in a message board where people are going to be complete ******** just because I ask a ******* question...

Moderators delete my account I will get help elsewhere as obviously this place is of no use to me.

Furthermore... I have done a lot of research and this is the only thing I have not been able to find... So thanks a lot you little *****


And another thing you little ****... I already know that I DO NOT NEED A RESISTOR BOX WITH THE 92-95 INJECTORS.

I only need to know if they can be hooked up to my wiring harness directly that way or if I need some extra lines to do this. Appreciate your being a dick have a nice life.

To everyone else thanks for trying to help, it was appreciated and I have read everything that you have suggested


Modified by thumbtack at 3:43 PM 7/21/2004

 

INJECTOR WIRING

getting electrical power to the fuel injectors. If you hadn’t noticed by now, the old dual-point engine had--you guessed it--two fuel injectors. The new engine has four. The crux of this part of the injector wiring exercise is to get ECU-controlled power distributed to each of the four injectors.

The first bugaboo, however, is the old dual-point Honda EFI system used something called high-impedance injectors. The new injectors on the multi-point engines are low-impedance units. This means you must step down the voltage to the correct levels, or the injectors won’t function correctly. To do this, you have to wire a Honda resistor box in series with the power feeds to the injectors. Here’s how it’s done.

Mount a new resistor box on the left-hand (driver’s side) shock tower, but first supply power to the resistor box connector. Taking larger gauge yellow wire with black stripe from the existing connector located in the engines harness on the left-hand shock tower, does this. This is the wire that provided power to the main injector on the old dual-point engine.

Next, run a brown wire from the resistor box connector to the No. 1 injector. It will replace the yellow wire that was the secondary injector wire. Then run a light blue wire from the connector to the No. 3 injector, replacing the red wire that was the primary injector wire.

The No. 2 and 4 injectors, however, are handled in a slightly different manner. Run a red wire from the No. 2 injector to A3 pin on the ECU. Also, run a yellow wire from the No. 4 injector to A7 on the ECU. We’ll also run these wires through the same connector at the right-hand shock tower the cylinder sensor connected through. This will allow us to disconnect the harness if we ever have to remove the engine. To do this, you must unplug the existing two wires plugged into pins A3 and A7. These aren’t needed anymore with the new engine, and can simply have their ends terminated with some heat-shrink tubing.

Finally, wire up the four power feeds from the resistor box connector out to the four injectors. In this case all four wires are red with black stripes.

 

QUOTE FROM FourthGenHatch http://www.automotivehelper.com/topic173362.htm
For those of you mixing and matching OBD-1 and OBD-0 allow me to clear up something which doesn't seem to be explained too well.

With OBD-0 injectors they are low impedance and require the use of an injector resistor box. The box turns down the power going to those injectors, if you have too much power going to them they will get fried. If you use OBD-1 injectors you DO NOT use an injector resistor box. OBD-1 injectors are high impedance and require more power to use them. You would simply solder the 4 same colored wires that would go to that box together, thus eliminating it.



For the intake manifolds it doesn't matter, they are just hunks of metal.

As for the TPS I believe you would still switch them because all the MPFI have the TPS turn the same way, the DPFI had them turn the other way so that is why you need to switch them around.

To use the MAP sensor on the OBD-1 manifold just extend the MAP sensor wires so they will reach to the engine and plug the vacuum hose onto the throttle body.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thumbtack &raquo;</TD></TR><TR><TD CLASS="quote">
I dont have to use the injector resistor box, so can I just hook my two injector power lines to all 4 of the injector lines? (i.e. 2 ---&gt; 4 all solder together?) will this work or do they have to have seperate power lines?

Thanks for your help.</TD></TR></TABLE>

yes this is exactly what you can do.... just solder all lines that would normally go to the injector resistor box... (see the pics above) and you got your obd1 injectors