i have a b16 in my 1998 cx hatch which is running on a p72 i think ... its from a gsr but my problem is that i bought a p2t jdm ecu and i wanted to see hoew to make it work because only two of the three plugs from the harnss fit into the new jdm ecu

 

oh and also does anyone have a picture or something to show me where to hook up my o2 sensors in my car as they are not hooked up and i dont know where to hook them in... thank you for your help

 

learn how to type

 

you will need a jumper hardness from obd2a to obd2b

 

i forgot to ask .
what engine hardness are you using?

 

I have a p2t. I thought it was canadian not jap(Someone?)... I don't know why you decided to swap ecu's. What's wrong with the p72?

 

ok first hoffmanb16 can blow me... but as far as the harness goes the p72 is not the proper ecu for my b16 so i bought the right one and now and i need the right harness which is the honda civic si harness. Does anyone knkow how hard it would be to change out the harness with the motor still in the car and also where i could get a layout as to how to put it in correctly. thank you in advance

 

is the stock usdm civic si ecu square ... i heard the square ones were jdm and the rectangle ones were usdm ...

 

You don't need to change the harness. That's making mountains outta molehills. Get a conversion harness, save yourself the headache.

Btw: That may have been called a "jdm" ecu, and they may have used them in japan(?), but it is not japan specific. p2t came in Canadian si as well, maybe more. Mine says Canada on it. The plugs should not change for markets only obd systems, only pin locations may change(never used a jdm ecu so I don't know).

Check out this page. It should help you figure out why things seem to be different.
http://www.hondata.com/techecuid.html

All you should need to run that ecu is an obd2a to obd2b harness. Look at the first ecu and determine obd2a or b. The p2t is obd2b. Ebay conversion harness: 35 bux shipped.

 

Ok but if I just convert that harness I have to work with my ecu won't it throw check engine codes ... I've seen where you have to modify abunch of stuff to get it to work right ... Anybody know anthing about that ?

 

just so u know i am currently running a jdm ecu with a jdm engine. if u use the jdm ecu it will not pass inspection unless your in a state where emissions i not required

 

Where do a find a jumper harness for a obd2 b ecu on an obd2 a harness

 

Again.... Ebay 35 bux shipped.

 

while hes doing that u can learn how 2 sop being a a__hole maybe the***** just cant spell .

 

Like everyone else said, an OBD2A to OBD2B convesion harness. As I side note I have my doubts that you bought a JDM ECU. Nearly all JDM OBD2 ECUs are OBD2A, they didn't switch to OBD2B like the US and Canada did for the most case. (CTRs did switch to OBD2B though IIRC) The first digit after the P2T will tell you the country the ECU was originally to be used in. If its an A, or a C its a north american ECU.

 

Your second post is yelling at someone? Just stop now.

 

Good info.

 

and this post helps how??? you only have 2 post dont blow it before you even get started.

i agree with 94EG8.........................

 

Thank you for all the great info but I think I am going to just swap my wiring harness for a stock si one so it can be as oem as possible ... Any idea where I could find a diagram or a write up on that so I can better prepaid my self for doing so ?

 

Why don't you just get a '96 - '97 Del Sol VTEC ECU (P30) correct ECU for your engine and its OBD2A so it plugs right in.