My motor was an Auto D16y8 -- It was out of a 98 Civic EX.

I bought a 99 D16y8 Manual/5 Speed motor, complete with everything (ECU, Tranny, Dist, Intake Mani, etc) and half of the engine harness -- the harness is cut so i can't use it.

Anyway, would I be able to use my existing wiring harness that's the Auto 98 EX D16y8 harness and plug the harness into my 5 speed 99 engine, and plug the 99 ECU into the other side of the harness and not worry about a thing???

When I plugged up my auto harness, I got a set or a clip of wires that don't plug into the 99 5 speed ecu.

My question simply is can I use my Auto 98 Ex d16y8 engine wiring harness, with my 99 EX 5 speed ecu + motor without modifying anything in the engine bay???

I need help before I waste money!!!

 

you need to repin two of the ECU pins for IACV
also the IACV plug for an auto differs from one for a manual.

wire in the new IACV plug to two wires, and then u move those wires on the auto ecu plugs to the right positoons.
u leave the fourth plug unplugged.

 

Thanks, but do you have like a how to on that?

This is my first engine swap, and I've done basically everything myself, with the help of my uncle who knows basically alot for b and h series engines.

Any help is greatly appreciated!

 

I think this thread helps some people do it, but i dont know, seems good to me maybe itll help you:

https://honda-tech.com/zerothread?id=1337459

 

wait quick question
how are u able to connect an obd2a 98 wiring harness to an obd2b 99 ecu?

that should not be able to just plug right in....

here is a link to the pinouts and actual pics of the ecu ends...
http://hondaswap.com/swap-arti...47169/

 

I plugged it up and it fit.

I will post pictures when I get home.