which wire harness should we use??

B16, B18, B20
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which wire harness should we use??

By j.r. rider
- Sun Jan 09, 2011 3:42 pm #232282 Hey guys i have questions and if ya can help that be great...we are planning install a B16a1 head on 98 LS..BOth are OBD2 but my question is that do we keep SI wire harness on or do we keep the LS wire harness on?? and Add a wire for the V-tec??
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By kapow
- Sun Jan 09, 2011 3:56 pm #232284 You can go either way, one or the other. Which ever harness has less wire to extend or mod to work with your application. You can DIY vtec wiring or go on rywire.com and buy it
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By kapow
- Sun Jan 09, 2011 4:06 pm #232286 If the LS wiring harness is OBD2, it is probably not best to use it, very hard to wire into your chassis, so it's best to stay OBD1 especially for tuning purposes, use the harness your chassis originally came with (assuming your ride is an eg civic) and wire up what ever is missing.

The only thing you need to change since its an OBD2 engine your using, is
* alternator plug, one is square other is circle (or change to OBD1 alternator)
* either injectors or injector plugs
* extend IAC sensor wires (JDM obd2 engines have IAC on the intake pipe, or you can drill and tap where it's suppose to go on the intake manifold obd1 style)
* 4 wire o2 sensor
* add knock sensor (can be disabled if your ecu is tuned, optional)
* vtec wiring (do it yourself, or rywire.com)

Most of the above is easy, if not just google each individual problem, you will find info on it all

If you need anymore help just PM me, I recently finished my first engine swap, obd2 b16 into my EG
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By asianrob
- Sun Jan 09, 2011 4:24 pm #232289 use your existing harness and wire that shit up.

search for the diagram and go from there.

if your car is a 92 then its prewired from the ECU to the shock tower for Vtec.

if not. then see what PIN connector it is. wire it to the shock tower plug. and then on the other shock tower plug wire it to the Vtec solenoid.

or you can buy the Rywire's Vtec lines.
http://www.rywire.com/catalog/product_i ... ucts_id=18
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By asianrob
- Sun Jan 09, 2011 4:26 pm #232290
kapow wrote:If the LS wiring harness is OBD2, it is probably not best to use it, very hard to wire into your chassis, so it's best to stay OBD1 especially for tuning purposes, use the harness your chassis originally came with (assuming your ride is an eg civic) and wire up what ever is missing.

The only thing you need to change since its an OBD2 engine your using, is
* alternator plug, one is square other is circle (or change to OBD1 alternator)
* either injectors or injector plugs
* extend IAC sensor wires (JDM obd2 engines have IAC on the intake pipe, or you can drill and tap where it's suppose to go on the intake manifold obd1 style)
* 4 wire o2 sensor
* add knock sensor (can be disabled if your ecu is tuned, optional)
* vtec wiring (do it yourself, or rywire.com)

Most of the above is easy, if not just google each individual problem, you will find info on it all

If you need anymore help just PM me, I recently finished my first engine swap, obd2 b16 into my EG


He'd also have to repin the Distributor to OBD1 or get an OBD1 Distributor.
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By Armann
- Mon Jan 10, 2011 9:45 am #232420 Didn't want to start a new thread, a similar question.

I have a LSI EG 1993 Civic, I'm guessing it has ODB1, going to
check tonight. I'm putting in a B16A2 that's ODB2.

Should I use my the ecu and harness that's in the car and buy a
ODB conversion harness ?

Thanks guys :D

EDIT: Just figured out I can't use my PM5/P04 ecu, going to need
to get a cpu/harness from a Esi car, that's the P28 ecu and harness from
that car.
Last edited by Armann on Mon Jan 10, 2011 11:17 am, edited 1 time in total.
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By kapow
- Mon Jan 10, 2011 11:07 am #232432
asianrob wrote:He'd also have to repin the Distributor to OBD1 or get an OBD1 Distributor.


thought I was forgetting something, was sitting there for 10 minutes trying to figure out what it was lol
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By asianrob
- Mon Jan 10, 2011 1:00 pm #232442
kapow wrote:
asianrob wrote:He'd also have to repin the Distributor to OBD1 or get an OBD1 Distributor.


thought I was forgetting something, was sitting there for 10 minutes trying to figure out what it was lol


lol i know what you mean

@ Armann: yes youd need that ESI harness or if you can get the Sir/ Vti harness and ECU (P30) for the B16 and then convert it to OBD1. i think that would be the easiest route but you can use your exsisting harness or the ESI harness and just wire up the things you dont have.
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By Armann
- Mon Jan 10, 2011 1:52 pm #232451 Moved my question to the ecu forum, don't want to hijack his thread.

By j.r. rider
- Wed Jan 12, 2011 6:30 am #232819 Hey thanks for all the helpfull advice guys....this Head slap was gona be done on my brothers 98 ls...his car is obd2..and so is the b16a1..im sry if my question was unclear to you guys but you guys have helped alot.. i will post a new question soon about my own car engine problem...
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By asianrob
- Wed Jan 12, 2011 9:20 pm #232912
j.r. rider wrote:Hey thanks for all the helpfull advice guys....this Head slap was gona be done on my brothers 98 ls...his car is obd2..and so is the b16a1..im sry if my question was unclear to you guys but you guys have helped alot.. i will post a new question soon about my own car engine problem...


ah ok yea just need to wire up the vtec and maybe some other things like knock and etc. you can use that rywire harness on it. since its a 98 car and wanting to keep it obd2 make sure you get all the OBD2A stuff. i think you might be good on the dizzy if its obd2. might be not sure.
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