I have a jdm b18c motor with a manual transmission I put it in a 2000 civic ek Ej8 it had an automatic transmission I used the harness from the old motor It was a d series have a p72 ecu manual and there's one to many plugs at the ecu plz help

 

Stop saying "plz help". It's annoying.

As I understand it, because it was an automatic, there are going to be extra plugs, for the automatic that isn't there any more. What exactly is the issue? Did you install it or did someone else?

 

Ok I'll stop and yes some else did

 

I put the motor in someone else did the harness

 

I asked you TWO questions.

 

Will it work like that do i leave it Unpluged?

 

Have you not even tried to start it up?

 

Will it even start?

 

I did with the old auto ecu

 

Starts rite up

 

If it doesn't throw any codes and runs then what's the issue?

 

I didn't try it with the p72 ecu yet because of that plug but i will and scan it and see what codes come up what do u think?

 

Thank you for your time

 

Try it with the P72 if you've already converted to 5 speed. You'll have to wire up a few things IACV, VTEC, knock, IAB.

 

Just tried it with the p72 cranks but doesn't fire tried it with old ecu and it starts

 

Is the P72 in working condition? Any ECU should theoretically be able to start and run that engine unless you have this one chipped and the basemap is bunk.

 

I'm assuming you have an obd2 chassis
And you are using an obd1 ecu

Purchase a obd1 to obd2 adapter.
Or purchase obd2 ecu if you go obd2
Make sure to wire in
Knock
Crank

Make sure of your grounds
Your timing
And your sparkplugs order
Vtec wires and iab

 

Ecu is a p72 its ODBII. Im thinking the issue is with me changing auto to manual.

 

Need to figure out how to get my harness that is wired for a P2P into my P72.

 

Are you saying you did these things?

 

Yes but mine was obd1 auto to manual conversion.
Don't know how differnt the chassis is just want to put some info on what I delt with.

He said he was missing a plug for ecu so I thought wrong ecu.
Car won't start if ground near the thermostat housing isn't making good contact. . Also the swap had the sparkplugs on wrong found that out after a couple cranks...don't bash me just trying to put some insight.
Op can you take a picture if what extra plug you are talking about and what is the complete number on your p72? P72-xxx?

Also like stated above check for codes, and since it worked with another ecu try a p72 from a friend. you might have a bad one.

 

2000 Civics aren't OBD1.

 

You civic is an obd2b, what yr ecu is the p72? There is no wrong way to hook up the ground wire on the thermostat housing. I'll be damn if its not the ground wire.

 

i know it is

 

You know it is what?