hi all, i have a 95 dx hatch and i want to make it into vtec. i dont want to run wires so for that i read that i have to get the enginge harness from a EX or SI with a p28. i have the p28 and i found a harness from a SI, my question, is that all i need? or do i need an inside harness as well that goes to the ecu? the guy who is selling it said its only the outside not the inside. i searched and didnt find any answers all i can find is "get an SI harness". thanks in advance.

 

kind of no where question. not enough info

 

have a d15b in it, i read that i have to get an SI harness. so my question is, are there like two parts to the harness that i have to look for? like the engine bay harness and then another one that goes inside the car? sorry, im new to this and im just trying to get this right. if its not enough, let me know ill try to explain again...lol

 

i think its all just one thing. cause it all run into your ecu

 

damn i hope so, hope that after i buy it i wont need another piece. thanks man

 

you need the wiring harness for the engine (im assuming your putting a d16z6 in?)

then you either need to, wire vtec from the passenger side shock tower plugs to the ECU, OR use the wiring harness from an ex or si civic, or any 1992 made civic

all 1992 made civics were prewired for vtec, post 92 were not

my suggestions is use a d16z6 harness (assuming thats what your putting in)

and just wire it in from the shock tower to the ECU, that is much easier and much cheaper

 

Theres your answer.

 

coo thanks, that makes sense. is there something i have to look for to know its a VTEC harness and not a NON VTEC one? i know easiest way would be to compare it to mine but im picking it up after work and i dont have my car with me.

 

VTEC harness has wires at ECU harness pins D6 and A4.
non-VTEC harness does not.


to clarify which pins those are:

http://hondacivicforum.com/forum/showthread.php?t=73241

 

is there a plug with certain color wires that i can look to see if it has that the dx doesnt have?

 

yea... A4 and D6... just follow the link i provided and it will tell you the colors.

 

coo thanks man

 

no problem...

 

If you're slightly familiar with the plug layout.. just after the branch where the 2 plugs for the dizzy are (rectangle 2 wire and rectangle 7 pin?) there is a plug for the temp guage (1 wire black) temp sender (ECU, round 2 wire) then you'll see reverse switch (rectangle 2 wire grey plug) And the VTEC wires (1-1wire rectangle plug, grey for the solenoid, and 1-2 wire round green connector for the VTEC pres switch..)

I don't know too many plugs on a honda harness that have a a round GREEN plug with 2 wires sticking out of it..