OK ive searched and come up with very little.

i need to know about some OBD-0 to OBD-1 ****.

if possable id like to make this a nice post abou any info on the conversion

i need to know about the wiring for injectors, like stories ive heard you can just cut the res. box off and solder all the wires together(this looks like ****) so i got a 92 95 harness i can rape parts from and i just wanna know about the 2 extra wires on the top prtion of the 92-95 harness. do i need them or just cut them off?

on the obd-0 harness their are only 5 wires on the 92-95 their are 7.

thanks and ill be back to ask more when i run into it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrswapdcivic &raquo;</TD></TR><TR><TD CLASS="quote">ive heard you can just cut the res. box off and solder all the wires together(this looks like ****)

on the obd-0 harness their are only 5 wires on the 92-95 their are 7</TD></TR></TABLE>

Don't worry about those extra wires, that connector is basically a power distribution "box", if you need to have 12V go to something, use one of the extra 2 wires.

 

All you really need is an OBD1 ecu, distributor, 4 wire o2 sensor and and ecu harness adaptor.

As far as the injectors go, its your choice. You don't need to change them at all, or you can go through the trouble of gettting injectors, the proper plugs and do the rewiring, and remove the resistor box. There is no performance difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deetz &raquo;</TD></TR><TR><TD CLASS="quote">All you really need is an OBD1 ecu, distributor, 4 wire o2 sensor and and ecu harness adaptor.

As far as the injectors go, its your choice. You don't need to change them at all, or you can go through the trouble of gettting injectors, the proper plugs and do the rewiring, and remove the resistor box. There is no performance difference.</TD></TR></TABLE>

What if you were converting the car to obd1 for the use of an aem ems out of a 92-95 civic?

 

^^^ that doesn't affect the injectors. As long as obd0 injectors are connected to the sesitor box, the end result is the same as obd1 injectors.....the computer would see the same amount of resistance.

 

Haha i answer this twice a day. Can't believe nothing came up in a search.

Anyway, OBD0 Injectors Require an Injector Resistor box, they fire with 5.5v+
OBD1 Injectors Require 12v+ at the injector, so you remove the Resistor Box.
The wires that are connected to the resistor box are 4 that go to the injectors and 1 yellow/black 12v+ that's connected to the main relay.
On an OBD1 conversion Rywire does this with the correct OBD1 Plug shown below.
To do this yourself you don't need to cut anything. you de-pin these female pins and pin them into the Grey connector!



Rywire.com Offers this service for $50, we will pin the new injector clips on, pin on the 8-pin plug, change your fan switch location if you're using an OBD1 engine block and re-pin a OBD1 Distributor plugs on for you. We crimp on factory honda pins! If you're running an ITR Setup we'll solder on the OBD2 alternator plug. Whatever you need done, we can do for you.

 

.
On an OBD1 conversion Rywire does this with the correct OBD1 Plug shown below.
To do this yourself you don't need to cut anything. you de-pin these female pins and pin them into the Grey connector!



so if i have this all i have to do is re-pin the plug with the 5 wires that came from the OBD-0 harness and i good right?
i dont need to worry about the extra 2 wires.

 

no, they don't exist on your Si/HF wiring.

 

any downsides running obd1 injectors with the resistor box still connected?

 

is there any way at all to use an obd0 dizzy?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UNKNOWN_MEMBER &raquo;</TD></TR><TR><TD CLASS="quote">any downsides running obd1 injectors with the resistor box still connected?</TD></TR></TABLE>
You can't!!! Then thresistance would be wrong, why would you want to do that anyway?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ne3ek &raquo;</TD></TR><TR><TD CLASS="quote">is there any way at all to use an obd0 dizzy?</TD></TR></TABLE>

No

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deetz &raquo;</TD></TR><TR><TD CLASS="quote">
You can't!!! Then thresistance would be wrong, why would you want to do that anyway?

No</TD></TR></TABLE> That's how my crx is right now. It's running too, lol. You can see the resistor here. Right beside the valvecover. OBD0 harness with OBD1 jumper harness.

 

I don't see a resistor in that pic. If your running obd1 injectors "with" an injector resistor, thats a good way to ruin your ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deetz &raquo;</TD></TR><TR><TD CLASS="quote">I don't see a resistor in that pic. If your running obd1 injectors "with" an injector resistor, thats a good way to ruin your ecu.</TD></TR></TABLE>



I don't think it would burn up the ECU... too little resistance would do that.

 

so I just cut the wires and wire all of them up? And performance lost by running the resistor?

 

I Know all about the conversion harness... so i'll need a 4 wire o2 sensor, obd1 dizzy, p28 ecu... now what about the vss? since the 4g crx is cabl.
does the harness bypass this or will it throw a cel due to no vss signal?

 

Keep up the good info.

 

1) http://www.boomslang.us/obd0_1.pdf this some info
2) http://www.boomslang.us/obd0to1.htm & these conversion harnes are a little cheaper

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hamstr323 &raquo;</TD></TR><TR><TD CLASS="quote">1) http://www.boomslang.us/obd0_1.pdf this some info
2) http://www.boomslang.us/obd0to1.htm & these conversion harnes are a little cheaper </TD></TR></TABLE> GOT IT! splice all wires and solder them together.

 

Dood, read above it tells you NOT to cut and solder, simply depin...

 

copied from boomslang.

How to remove a resistor box from your MPFI vehicle:
- unclip the resistor box connector.
- unbolt and remove resistor box from your vehicle
- cut the resistor box connector off of the engine harness.
- splice together ALL the cut wires that were going into the connector. We recommend soldering the wires together. Use electrical tape or heat-shrink tubing to insulate the connection.

 

Thats great... Im not saying hes wrong (thats one method) but I am telling you that that is not the most efficient/cleanest way.

Ryan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deetz &raquo;</TD></TR><TR><TD CLASS="quote">All you really need is an OBD1 ecu, distributor, 4 wire o2 sensor and and ecu harness adaptor.

As far as the injectors go, its your choice. You don't need to change them at all, or you can go through the trouble of gettting injectors, the proper plugs and do the rewiring, and remove the resistor box. There is no performance difference.</TD></TR></TABLE>

I did exactly what you did and the car runs great! I did no splicing of the injector harness and kept my obd0 injectors w/resistor box. All I did was purchase a boomslang obd0 to obd1 conversion harness and created my own obd0 to obd1 distributor jumper harness so I wouldn't hack the original harness. I can switch between the both obd0 or obd1 if I needed too just by changing the distributor and the ecu but i'll have the endure the o2 code. At least the car will run.
Why break something that isn't broke by splicing wires?!?! It causes more headaches when trouble shooting.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by droppedcrxsi &raquo;</TD></TR><TR><TD CLASS="quote">Thats great... Im not saying hes wrong (thats one method) but I am telling you that that is not the most efficient/cleanest way.

Ryan </TD></TR></TABLE> if you can hook me up with a free depin set then by all means i will do it that way . But if i'm going to have to pay for something for somethign i can do for free then i'm going for free. It's hard to say no to free things.

 

i use a tiny *** screwdriver it's a stnaley flat head that was like mega cheap.