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I got a 1994 mazda mx3 i took the 1.8 engine out and i put a 2.5 engine into it from a 1996 mazda mx6 will i need to get a new engine harness for the 2.5 engine or will the 1.8 engine harness work?

As I've been told like many others, read read read. This forum is practically dedicated to that swap and the jdm version of that engine and it sounds like a direct swap. You may need to swap ecu's from a KL car but I think theres a Probinator chip for the K8 ecu as well. Take a look around the FAQ section theres alot of info in there. Or if you search just type in KLDE swap I'm sure you'll get plenty of results.

http://www.mx-3.com/phpBB3/search.php
http://www.mx-3.com/phpBB3/viewforum.php?f=23
http://www.mx-3.com/phpBB3/viewtopic.php?f=23&t=34783
http://www.mx-3.com/phpBB3/search.php?k ... mit=Search

Oh and welcome to the site its good to see n00bs here sometimes as I'm one myself.

Oh noticing your model years you swapped an obd 2 engine into what may be an obd 1 car. You'll have to verify which ecu you have as I think I read the change over was mid year in 94.

I changed the ecu's already so now i just need to find out if i have to change the engine harness?

Nope. Just use the sensors and such from the K8 and all will be good.

Will i have to get a distributer for the 2.5 engine or will the 1.8 distributer work?

"and such" = disty and...other misc crap you're not sure about, lol.

What all would i have to change on the motor?

Savin wrote:http://www.mx-3.com/phpBB3/search.php

I already suggested that link

I know. Where do you think I copied the link from?

That's right. Your post. Uh huh.

1) search.php

2) Take all sensors from K8, move to KL

3) Take disty from K8, move to KL

4) Route vacuum lines as possible.

5) Use proper ECU/VAF combo

6) Install clutch to handlethe 2.5L

Will i have any extra clips that dont plug into anything??

carizle wrote:Oh noticing your model years you swapped an obd 2 engine into what may be an obd 1 car. You'll have to verify which ecu you have as I think I read the change over was mid year in 94.

Without trying to insult you carizle, there is no such thing as an OBD1 or OBD2 engines,,period. Simply make the engine look like the K8 you removed and your good to go. Always use the Disty that came with your car.

d-mcgeachy, if you installed the engine with the 96 exhaust manifolds you'll notice there's an extra O2 sensor in each exhaust. Just ignore the bottom ones.

Daninski wrote:

carizle wrote:Oh noticing your model years you swapped an obd 2 engine into what may be an obd 1 car. You'll have to verify which ecu you have as I think I read the change over was mid year in 94.

Without trying to insult you carizle, there is no such thing as an OBD1 or OBD2 engines,,period. Simply make the engine look like the K8 you removed and your good to go. Always use the Disty that came with your car.

d-mcgeachy, if you installed the engine with the 96 exhaust manifolds you'll notice there's an extra O2 sensor in each exhaust. Just ignore the bottom ones.

Its cool Dan I'm not offended easily anyway. All I know is I try to stay away from anything that had obd2. I was just assuming there might be some harness complications. But you know what they say, when you assume, you make an a-- of u and me