alright im puttin a b18c in my 92 civic dx. it is ready to drop in now but im unsure on the wiring. i know what wires need to be ran to which point on the ecu but unsure how to do it. all the spots on the plugs that actually plugs into the ecu are full, which im guessing they should be. my question is should i just splice into the wire that goes to the spot i need to run the new wire. or do i need to take the old wire out and insert my new wire.

hope u understand my question i know it is a little confusing
thanks for the help

 

i think i get it.. yah u should take that wire out.. if u know how to remove the wire from the plug.. its not that hard.. take out the wire and insert the new one.. it will start to look messy if u just splice them all.

 

so what do i do with the old wire just let it hang or take it out completly. also are those wires just like dead wires not running anything, because if they are not wouldnt i just mess something else up

 

ok.. take the harness out and put it on a table.. it will be easier this way.
yeah the wire that u are changing.. follow that wire and see where all it goes.. if it doesnt connect to anything else, then pull it completely and replace it with the new one.
some of the wires might be shielded.(1 or 2 wires that are wrapped by a metal braided wire and then the metal wire is grounded.) if its like that then u need to keep it the same. do u know what i mean?
if u have a helms manual. u should use that.. it helped me alot.