darrshman

I have a 2000 civic DX model with 75,000kms that can't pass inspection for a number of reasons, so I want to swap the motor and transmission into a 1998 si coupe with a destroyed motor, and was wondering if there's anything I should look out for for the swap, are the motor mounts the same? Will the si ecu plug directly into the non VTEC motor that I'm swapping in or should I use my DX ecu? Just looking for any tips/advice you can give~

gchcivic

They didn't make an si in 1998 and if they did it would have had a b16a2. Completely different wiring. So do you mean putting an si motor into your car (b16a2) or putting in another d-series from a car that you think is an SI.

TomCat39

Or is it a 99 Si? The first year they brought the Si back after 95.

NotARaCist

iTrader: (1)

Unless OP is Canadian, guys. Come on, this is super simple stuff. The Canadian SI ran 96-00. OP, are you Canadian?

TomCat39

Thanks for clarifying. Would be nice if there was a Canadian online OEM website like there is 20 of them for USDM.

Would make trivial bits of information like this more apparent for those of us that don't know every detail of Honda's history.

Was thinking the same thing for foreign manuals, would be awesome if there was a EURO and JAPAN version of Helm Inc. :/

If the Si is a B series motor, it won't be a straight swap, you will need quite a lot for the D16Y7 including intake and exhaust manifolds, ecu, fuel rail, distributor and whatever else the D16 needs that the B16 is different on.

HondaPartsHero

Torontohondaparts.com

NotARaCist

iTrader: (1)

There are, they're just obnoxiously hard to find, and when you finally find one, it's in a regional language that you probably don't know.

TomCat39

Sweet, thank you, will add that to my list of tools.
Oh right, didn't think about that. Google translate is fine for online but a hardcopy manual on the other hand......

It's all in the details and sometimes I miss some big **** details.

(Original paragraph removed) NVM, I'm getting all *** backwards. I'll keep quiet now.

00silverdxhatch

you need to get an obd2a wire harness from a 96-98 dx or cx with a Y7. the 00 y7 harness will not work in a obd2a car. . . . its obd2b and there is no way to use the Si harness because it will always look for VTEC.

Whats torn up on the Y8 is the head any good . . .swap it onto the y7 block and you can use the complete Si harness, Si intake, Si dizzy . . . that's the only way . . they threw a real kink into these 96-00 with the OBD upgrade for 99+

00silverdxhatch

Also don't forget to take the knock sensor out of the Y8 Block, and put it into the Y7 if doing a mini me . .

NotARaCist

iTrader: (1)

Uh, no. The harness doesn't look for VTEC. If you use a non-VTEC ECU, you can just leave the VTEC plugs unplugged, and you won't have any problems. There's no reason OP can't use his original harness.

00silverdxhatch

lets not misinform the guy . . . what happens when he tries to plug in his obd2a car into the obd2b ecu . .. its not gonna work . . he will have no connection to the dash harness . . .come on man . .. there sure is a really good reason he cant use his obd2b harness in the obd2a car . . .

00silverdxhatch

you can pick up the proper harness for 100 bucks and then use your y7 nooo problems .

NotARaCist

iTrader: (1)

Or he could get an OBD2B ECU, or an adapter harness. You're talking about entirely more work than is necessary, and wasted money.

00silverdxhatch

do you even understand his post? he wants to put his obd2b y7 into an obd2a car . . . the dash harness is different in the 98 than it is in the 00 . . . the y7 harness will not work with the car . . . you know that 3rd plug that connects the car to the ecu . . . .it will not plug into the 2b ecu . . . he needs a 2a ecu and harness . . .maybe stop and read his post then you will understand.

I just went out to my car 00 dx... tried to plug my dash harness into a 2a p2e ecu . . it no fit . . . so . .with that confirmed . . .his 2b y7 harness and ecu will not work in his 2a 98 civic . .. I think its pretty simple and clear. . .

the engine will be out of the car .. change your harness to a 2a y7 for 100 bucks and drop it in with no problems

question answered, enjoy OP

NotARaCist

iTrader: (1)

There is absolutely zero reason to swap the harness. I've read his post. The OBD2A harness can plug into the OBD2B engine just fine. An OBD2A Y7 ECU can control the OBD2B engine just fine. An OBD2B Y7 ECU with an OBD2A to OBD2B adapter harness can control his OBD2B engine just fine. You are completely over-complicating the process.

tony_2018

Some of you guys need to have an open mind about the world of Honda.

OP reused the harness on the motor, thats its.

tony_2018

I can confirm this, he just needs to purchase the obd2a ecu, or buy a conversion harness to use the obd2b ecu. If the op has to ask which route from here than by all means just sell the damn thing.

edit: I think the only small issue is trying to reroute certain plugs, but that should not be an issue.

HondaPartsHero

If both of your vehicles are 5 speed just remember if you use the 98 Si harness you'll have to convert your IACV to 3 wire at the harness and the ECU. Also the Si secondary oxygen sensor is located at the cat at the end of the collector area and the DX is located at the exhaust manifold so I'd use the Si exhaust manifold just to be easier. Note you may have some issues using the 00 ECU as far a emissions components go (EVAP items) so it might be easier to find a 96-98 ECU for the Y7.

tony_2018

If he re-uses the current exhaust system in the 98, including header, than he should be fine as long as he uses the ex harness and does the minor changes to it. Saves money that way if he can.

00silverdxhatch

time is money . . . . buy an obd2a y7 harness . . . 10 minuites, job done.

00silverdxhatch

Thanks for backing me up . . . much appreciated. This guy also knows what he is talking about.
+1 to parts hero !

tony_2018

I don't see how he backed you up, he's saying if the op uses the 98 si/ex harness than certain wires need to be corrected and buy a 96-98 ecu....

tony_2018

Well its quite obvious you needed a conversion harness to use an obd2a ecu in an obd2b car, why would you even try it? The A plug functions differently for both ecus. And thats why he stated to buy a conversion harness. I can see where running an obd2b ecu in an obd2a car could be an issue because there could be more emission functions on them but this is Canada, I wouldn't know if your ecus are different than ours. Other than that the car should still function if he gets the conversion harness to run the obd2b ecu.

tony_2018

I just read every post before this one that you made and there were no misinformed information. If he uses a P2E ecu than it will not look for vtec, which is true. The current obd2a engine harness thats in the 98 civic will also plug right up to it with minor adjustments. How do I know, because I'm running an EX engine harness in an LX civic and I'm using a P2E ecu.

Time is money right, so why not use what you got right in front of you?