i bought a 1990 civic si with a blown engine for dirt cheap i ordered a DOHC zc engine for it ( this is my first swap by the way) but now im a little confused on the wiring .i bought it from hmotorsonline.com and they just cut the harness in half . how do i get all my wires to match up. The plugs are different sizes and shapes

 

use your original harness from the old motor and add the required plugs if need be. take a look in the faqs section to figure out what you need to do. its not hard to swap an engine even if it is your first. take a ponder in there, there is tons of information to be had.

also is/was your car dpfi or mpfi?

 

if you have a civic Si, then the only thing you will really have to change is the distributor wiring.


You should already be at Multi port if you are at a civic si.

check this out

http://fourthgenhatch.net/zc.html

 

how do i find out if it is mpfi dpfi

 

DPFI has a carburetor-like manifold with two injectors, MPFI is a smaller regular looking manifold with 4 injectors.
Here's my MPFI-Swapped Civic if your manifold is taller with a black covering it's DPFI

 

ok then i have a mpfi on the d16a6 i took out and on the zc

 

it's a straight swap over. Car should start right up. If it doesn't crank it for like 5 minutes and it'll fire; sometimes the engines sit for a while and are a little hard to get going again.

 

ok great! What about the distributor plugs how do i get those to fit

 

Oh cripes. Mine just plugged right in, but someone might have done something weird to my car before.

ummmmmmmmmmm

you can depin the plug and get the one off the old harness and put the pins in? Just match the colors up. THat's my best advice.