am i able to use the wiring harness from a 96 civic onto a 99 ls motor? i have tried to put the civic harness onto the ls motor but some of the harness dont line up onto the ls motor i have been told it will work but its not..

in an ls does the ecu plug into the firewall then from the firewall into the motor? and if so is there an adapter i can just add to the the ls harness because my civic does not have the firewall adapter?

sorry if this is confusing its late...

thanx

 

Basicly, will 96 motor wireing fit onto 99 ls motor?

 

you need to change and extend the iat plug (if you use that from the ls)
thats it, everything else will fit (unless you have a 3 wire iacv, instead of 2wire)