Ok ill break it down real quick... I got 99 civic hatch i swaped a ls in it and i have a obd1 jumper and ecu. Im using a 99 ex vtec engine harness and theres alot more plugs. Im tryin 2 find out which wires go to the iacv? Cuz theres about 4 plugs that will plug into it.. If any1 can show a diagram of all the color wires that plug into which sensors much app.. Pics would be most help thank u!!

 

Round connector, one wire will be either black/yellow stripe or yellow/black stripe

 

A local parts store can get a diagram more than likely, but the above post is correct to my knowledge. I did a b16a2 swap into my ek

 

ill send you a pm
with the wires codes

 

Is your 99 Civic EX wire harness for an auto or manual transmission?

 

i bet auto

 

Can you post a picture of the extra plugs on the harness??

I would use the stock Dx harness and convert the 3 wire IACV to a 2 wire.