looking at 5th gen hatch, not SI, its a CX. i heard it was just the 92 years, but on another forum they siad it was 92-93 were pre-wired for vtec.

should be a short and simple question

TIA

 

I know VXs are prewired for vtec, but I'm not sure about the CX.

 

i know that too, but were talking base model CX lol. if somebody can answer me quick it would be sweet then i can delete the post

 

all 92 civics!!! all 92 trims
later model are only came with the specific vtec model, such as the SI, VX, EX!!

 

Just check your ecu and see if it has all the wires coming out of it....if it does then its prewired

 

thanks HATCHingMN, that what i thought too. lets see if anybody else says different on here.

 

Just as hatchingMN said. All 92's are wired from the ecu to the shock towers. You will need to pin in 3 wires at the shock tower and your done.

 

so all i have to do for the swap is 3 wires in TOTAL, not just for vtec? i thought there were more

 

It really depends on what motor & ECU your going to use. If your ECU wants a knock sensor, you need to add that. If your ECU and motor have IABs (intake air bypass like on GSR), you need to wire those. If your motor/ECU has EGR (exhaust gas recirculation), you need to add that. If your Motor/ECU needs an injector resistor box, you need to add that.

If you want to know if your MAIN wire harness is pre-wired for vtec, look at the plugs on the passenger side shock tower. The top-most plug has the wires in question. Check for wires coming out of the upper most hole closest to the passenger side fender. That is one of the vtec wires (the other is just below & closer to the fender). If you have those wires, your good to go.

Now your engine wire harness is whole different story. If your getting a JDM motor, you have to cut up your USDM wire harness & adapt it to the JDM plugs & motor. If you get a USDM motor, it should plug & play (if its obd1).

 

or u could just use a SI/EX harness and not pin anything.. thats what i did, and what 3 wires thought there were only 2 for vtec.. ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ReDHaTcHy97 &raquo;</TD></TR><TR><TD CLASS="quote">and what 3 wires thought there were only 2 for vtec.. ?</TD></TR></TABLE>

Correct!

 

ok ill be getting a the b16 sir II complete swap from toykoautoparts.com from toronto, Canada... if that helps...

 

Just wire in the 2 vtec wires and ground the other one coming from the solenoid. That is what I meant by the 3rd wire.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXified &raquo;</TD></TR><TR><TD CLASS="quote">ok ill be getting a the b16 sir II complete swap from toykoautoparts.com from toronto, Canada... if that helps...</TD></TR></TABLE>

You will need to wire up a knock sensor. I suggest you get shilded wire, so EM interferance doens't cause your computer to detect knock prematurly (then it retards your timing).

You will also need to build yourself an Engine wire harness using the plugs from the Sir2.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94eg! &raquo;</TD></TR><TR><TD CLASS="quote">.

You will also need to build yourself an Engine wire harness using the plugs from the Sir2.</TD></TR></TABLE>

why doesn he need to build a harness???? all he has to do is add a few wire to his harness.......that makes no sense

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ReDHaTcHy97 &raquo;</TD></TR><TR><TD CLASS="quote">

why doesn he need to build a harness???? all he has to do is add a few wire to his harness.......that makes no sense</TD></TR></TABLE>

I would call that building a wire harness.

It sure ain't plug & play...

 

isn't it also true that ALL 92-95 civic in Canada are pre-wired???....someone confirm. plz

 

i dont belive, i think that only the 92 civics are prewired for vtec in canada, not sure about the rest.

as for the wiring harness i can use mine i just have to add like 4 or 5 wires into the plugs on my harness and it should plug into the harness on the b16, am i right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95cxhatch &raquo;</TD></TR><TR><TD CLASS="quote">isn't it also true that ALL 92-95 civic in Canada are pre-wired???....someone confirm. plz</TD></TR></TABLE>

hey man ur on lowmotion right? i thought i recognized the link in ur sig. as far as i know its just the 92. the 92-95 VX models are per-wired, but sometimes its hard to get a straight answer, i guess ill know when i try eh?

 

You can avoid using a knock sensor if you chip your ecu and disable it.

 

what kind of chip do u need to disable it?

 

the p28 from an SI or EX does not look for a knock sensor. The whole program never run an knock sensor.
You can reprograme (aka chip) the p28 to run a DOHC program.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HATCHingMN &raquo;</TD></TR><TR><TD CLASS="quote">the p28 from an SI or EX does not look for a knock sensor. The whole program never run an knock sensor.
You can reprograme (aka chip) the p28 to run a DOHC program.</TD></TR></TABLE>

good to know, can u run the p28 on the dohc engine without chipping it? or will it not work at all? any idea what ecu would come with the swap when i buy it? they say it comes with engine, tranny, ECU, ect. would it be the p28?

 

You can run an DOHC vtec engine with an p28 unchip. It will work but you wont get the full potential. I wont recommend using it permanent...unless you are doing as an temporary fix.

All jdm engine b16 sir2 come with a p30 ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HATCHingMN &raquo;</TD></TR><TR><TD CLASS="quote">You can run an DOHC vtec engine with an p28 unchip. It will work but you wont get the full potential. I wont recommend using it permanent...unless you are doing as an temporary fix.

All jdm engine b16 sir2 come with a p30 ecu.</TD></TR></TABLE>

cool. confirmed that teh swap im getting comes with the p30, thanks for all your help HATCHinMN!