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So ive been doing research the last few days but Im very confused from so many diff threads with diff answers. Heres where im at. I have a 2000 civic Dx. I also have a 98 Ex. Both are automatic. My 2000 dx d16y7 crapped out on me and the 96 ex body is not safe plus the title is missing a number(dmv screw up) . I got both engines out today. What do i need to do to make My 2000 honda dx take the D16y8. I have the following,
D16y8 engine ,harness , ecu , intake , exhaust , everything i think.
Is there anything else i need? Do I need to do any wiring?
Any links that will help ill sure research. please point me in the right direction, ty ty ty

 
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Since you have 2 complete cars luckily you have everything you need.
Take the complete vtec engine with manifolds, engine harness and ecu and put it in the non vtec shell. The vtec trans will have 'sportier' gear ratios so you should swap that over as well. You might need to fab up some exhaust between the vtec cat and the cat back pipe on the non vtec shell. Once everything is swapped over make sure you drive it lots and eliminate any problems before you get rid of any parts

 
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Could I just switch over the complete exhaust from the Vtec shell?

 
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what body styles are they?

 
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2000 DX and 96 EX :P

coupe, sedan, or hatch?

 
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Both are Coupes

 
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I got a specific question , I found a write up on using the stock wiring harness. Do i need to find a 99-00 Vtec ecu? or can I use the 99-00 Non-Vtec ecu?If i can use the stock I need to find a wiring diagram cuzz the write-up pictures are gone. http://www.d-series.org/forums/diy-f...g-harness.html

 
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Ok so you'll be able to swap the exhaust no problem

Just use the vtec ecu you have, you're swapping everything from the vtec car so everything should transfer over and work fine

 
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Thx Colin42 ,I would have done this in the first place but i was worried what this connector goes to. The one on the right. I dont see it on the non-vtec shell.

 
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Ops The connector im talking about is on the right.

 
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I'll look at my girlfriends car when I get home, could be day time running lights or something. It doesn't plug into anything on the car it's currently attached to?

 
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It pluged into the v-tec harness.

 
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BTW thx for the help Colin42 ,i took off today to try to get this working but ive been hitchhiking 20 miles to work the last week.I really appreciate it.

 
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No worries man, so the vtec motor (or a least the engine harness) is out and it plugged into that connector? Where does that harness go? Might end at the fusebox or the ecu?

 
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yes the engine and harness are out of the v-tec shell ,Im not sure where it goes ,it connects with the other connector and splits off into the cabin in front of the drivers side firewall and towards the drivers side headlights near the cruise control.I will try to follow it and see.

 
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I have not tried the y8 harness .I have the original y7 harness and ecu in .I tried to run it without v-tec untill i could wire v-tec in so i could get to work . But Wont start.

 
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you'll have to swap that over as well, i think if that cars had both been ob2a or b or whatever you might have been able to get away with doing that and just running it as non-vtec, like it talks about in the thread you linked.
If some of those wires are going into the cabin, they might be going to the inside fuse panel or the cluster
What does it do when you try to start it?

 
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it wants to start but just puts for a second or 2.

 
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Injectors not firing maybe? if you spray some brake clean or carb cleaner into the throttle body does it run for a bit longer?

 
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I have some starter fluid i sprayed in there but no it didnt help. Im proubly just gonna do what you suggested and switch the y8 harness over, y8 ecu and put the y8 intake on and cross my fingers that the one connection is for fog h lights or cruise control or something not important.If that dosnt work ill just order whatever i need (99-00 vtec harness maybe) to make it right.The engine ran fine in the Ex so its not a bad engine. Im gonna try and find out what that connection goes too atm.

 
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This is a link to down load a scanned copy of a 6th gen service manual, you'll have to do some digging but it will have information about the connectors.
I'll take pictures of my girlfriends car tonight

 
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thx I believe its called c-136 and i think its for the auto trans so looks like im gonna need. If thats the case im totally lost on what to do

 
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Have you tried starting it in neutral? (just a thought because it looks like one of the wires is for the interlock)

In the link I posted, pages 1925, 1926, 2084, 2112 have connector 136 on them, it looks like they go from that connector to the pcm, so i think you're going to have to transfer that connector and the wires unfortunately

 
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no I havnt tried in neutral but i will . Well it started raining so ill have to try later or tomorrow. I just checked pick and pull to see if they had any 99-00 EX civics and they have one of each.If I go there tomorrow I may be able to pick up a 99-00 harness and ecu. Would that solve my proublems? Anything else I should pick up while im there?

 
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It might, did you swap over trannys as well or just the engine and harness?
As long as everything is swapped from one car to the other it should work.
I would look carefully for differences between the 96-98 and 99-00, you made need some different sensors or something

 
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yes i swapped over Trannys.I havnt swapped over harness yet cuzz of connection c136 is on the harness. I am thinking I just need a 99-00 v-tec harness.I mean isnt a 99-00 ecu the same for v-tec and non v-tec ?
I got ...
obd2a v-tec harness (has c136 connection)
obd2b non-v-tec harness(no c136 connection)
obd2a ecu
obd2b ecu

I dont know man my frikn brain hurts

 
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ecu should be different because of the vtec, have you tried following that connector past the firewall?
sorry dude i didn't think it would be this difficult

 
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did that year car have immobilizer? (I think not, but...)

 
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not yet it was raining pretty hard , ill look when sun comes out.

 
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dont know the answwer to that,Ill see if i can find out.