Newb questions about a d15b swap in a 94 cx hatch

[wrxya33]

Ok guys i been working on cars swapping motors building turbo setups but this is my first honda. I been reading up alot about this swap and gathered as much as i could. So what i did was i ordered a d15b motor and tranny 5spd from hmotorsonline. To replace the stock shitty cx motor what ever that engine code is. So the swapping in part is easy for me its the simple wiring im confused about. For some reason i have a 4 wire o2 sensor and appaerantly im not supposed to. But this works in my favor i think cause if im useing the us p28 ecu instead of the po8 for the jdm motor then it requires a 4 wire 02 sensor correct? Also do i need to wire up the knock sensor? For vtec to work i need to run 2 wires to the ecu from the vtec solonoid is that it? That should be everyting i need to be up and running i hope let me kno if i missed somthing. thanks

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[wrxya33]

bump

[HondaPartsHero]

no knock sensor to wire up just the VTEC wiring, actually the D15B usually doesn't come with the pressure switch so you'll have to bypass it or get one for it

[wrxya33]

ok cool how do i go about bypassing the vtec pressure switch

[wrxya33]

bumpp how to bypass the pressure switch and also what belt do i need if my old motor didnt have power steering but the new one came wit the pump and i dont want to use it

[HondaPartsHero]

connect A4 to D6 at the ECU

[d15-jdm-civic]

Originally Posted by HondaPartsHero

connect A4 to D6 at the ECU

thats all you have to do to bypass a pressure switch?? and does it make a diff. to bypass it or have a pressure switch??

[wrxya33]

really awsome thanks alot how do i kno if i ahve a pressure switch or not will their be more wires then without coming from the vtec solonoid

[wrxya33]

still wondering about the power steering belt which one to use if i dont have it

[wrxya33]

cmon guys help me out ik alot of u guys are running this setup

[Bejita]

Ok Bro...I'll answer everything.....If you got the P08 ECU like you should have...all of this will apply.

The o2 sensor- Use the 1 wire o2 that came with the motor. Splice only the white wire from your harness to it.

Vtec- Here is what I did.....I spliced into the wires at the harness instead of at the ECU. These wires go the the proper pins. I spliced em right at these 2 wires.

[Bejita]

Originally Posted by HondaPartsHero

connect A4 to D6 at the ECU

WTF are you talking about?!?!?

Originally Posted by HondaPartsHero

no knock sensor to wire up just the VTEC wiring, actually the D15B usually doesn't come with the pressure switch so you'll have to bypass it or get one for it

This guy is crazy......dont listen to a thing he is saying....Nothing he says is making any scense. Everything that came with the motor is all you need. I just did this swap a few weeks ago...easy as pie.

Go here for EVERYTHING-------- http://www.d-series.org/forums...32597

[HondaPartsHero]

Originally Posted by Hondapartshero

connect A4 to D6 at the ECU

Originally Posted by Bejita

WTF are you talking about?!?!?

I mean I may not know what I'm talking about, according to you, but I think phearable.net is a pretty knowledgable source (source of the above pic), as well as a lot of other people who have done this, including it seems like yourself except you did it at the shock tower instead of the ECU

Originally Posted by Bejita

I spliced into the wires at the harness instead of at the ECU

Originally Posted by Bejita

This guy is crazy......dont listen to a thing he is saying....Nothing he says is making any scense. Everything that came with the motor is all you need

Its pretty common knowledge that a lot of D15b as well as other OBD2 JDM motors don't come with the pressure switch. Here is a picture on a OBD2 GSR engine (first pic) and a D15B VTEC solenoid right here without the switch (second pic)

Originally Posted by Bejita

If you got the P08 ECU like you should have.

Originally Posted by wrxya33

think cause if im useing the us p28 ecu instead of the po8 for the jdm motor

Reading comprehension

Originally Posted by Bejita

I just did this swap a few weeks ago...easy as pie.

I did too and it didn't have a pressure switch, you could have been lucky to get one that did



Modified by HondaPartsHero at 3:48 PM 6/14/2007

[Bejita]

Wow..You really are an idiot.

HIS CAR ISN'T OBD2 AND NIETHER IS THE ENGINE!! If he bought it from Hmotors like he said...They sent him an OBD1 engine. They know their shit.

Using a P28 with that engine is a hastle because you have to (well you should)program the P08 maps on it and then convert the 1 wire O2 sensor to a 4 wire.

You should have gotten the P08 ECU while you were at it....It would have saved you a bunch of trouble.

As far as Vtec wiring goes....You’ll need to run the blue wire (from the pressure switch) to pin D6, and then run the black ground wire from the plug to anywhere on the motor. You then need to run the green wire from the VTEC solenoid to pin A4.


Get the P08 ECU.

[HondaPartsHero]

The engine I put in two weeks ago for a friend is OBD1, so is the picture of the motor above, so is the engine he received. The one I put in and the one pictured above and motors that a lot of people have received that are OBD1 also do not come with a pressure switch. His may have one I'm not arguing that I'm saying as in my original post most D15B's I've seen usually don't come with the pressure switch, pretty much all OBD2's but a lot, not all, of OBD1's. So for the OP if you don't have one you'll have to bypass the switch or get a pressure switch.

[wrxya33]

bump still wondering bout what belt to use for no power steering

[Bejita]

Just go to whatever auto store you like and get an alternator belt for the base model civic you have. They'll ask with or without PS. Done deal hommie.

And parts hero.....Sorry I'm acting like a dick to you....I truely apologize. I got my motor (D15b) from HMotors and it came with the pressure switch. Here is a pic of how my motor came from Hmotors. All I did was remove the plastic. I didnt even clean it!!

[ReDemoN]

Here is my ? I feel like an idiot asking this.

But I have a 4-wire O2 sensor on the car factory.
I have a D15B with the 1-wire sensor.
My ? is how do I hook that up?
The harness thats on the motor when I got it is of course a RHD harness.
What is the pinout on the P08 computer for the 1-wire O2?
If I could get that I could just wire it myself.
Any help would be appreciated.
Thanks

[HondaPartsHero]

just splice it into the white wire on your 4 wire harness. no prob bejita, we got ours from hmo too, but it was from an automatic so maybe that was the difference

[Bejita]

Originally Posted by ReDemoN

Here is my ? I feel like an idiot asking this.

But I have a 4-wire O2 sensor on the car factory.
I have a D15B with the 1-wire sensor.
My ? is how do I hook that up?
The harness thats on the motor when I got it is of course a RHD harness.
What is the pinout on the P08 computer for the 1-wire O2?
If I could get that I could just wire it myself.
Any help would be appreciated.
Thanks

Just like stated above take the white wire from your harness and hook it to the 1 wire o2 on your manifold...Thats it bud.