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Old 09-04-2016, 09:49 AM   #1 (permalink)
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Default confused as F now. OBD2a/b question.

I've been reading around and seeing a lot of conflicting info about this.
Here it is:
2000 civic dx D16Y7 in it currently
Junkyard 2000 D16Y8 engine (being rebuilt)
Junkyard 1998 D16Y8 engine harness

My whole idea is that the harness (OBD2a) will plug into the 2000 D16Y8 engine (OBD2b) with a little rewiring of the O2 and I guess the dizzy...? Am I correct? I'm plugging it all up to an OBD1 ecu chipped for the S300 and converted for the OBD2a harness to plug into. I've read that I will absolutely need the 99-00(OBD2b) harness for it to work and the OBD2a harness won't work at all...
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Old 09-04-2016, 09:51 AM   #2 (permalink)
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Unless you are able to figure out the wiring, you need an OBD2B harness. Since you even have to ask, tells me you just need to get the right harness.


If you had the skills, this thread would never have been created, you would have started repinning and adding more wires, and used the harness already.
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Old 09-04-2016, 09:58 AM   #3 (permalink)
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Originally Posted by FarmerD View Post
Unless you are able to figure out the wiring, you need an OBD2B harness. Since you even have to ask, tells me you just need to get the right harness.


If you had the skills, this thread would never have been created, you would have started repinning and adding more wires, and used the harness already.
well thats the thing. I've already read up on the rewiring for the o2 and dizzy and have that figured out. I have the skills on how to re-wire. please don't make assumptions. The question again is if there is something else about the OBD2a harness that i need to know about as far as they react to a originally OBD2b engine.
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Old 09-04-2016, 10:06 AM   #4 (permalink)
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Harness to match the body of the car.
Ecu jumper harness to match the body of the car.
Dizzy to match the body of the car.
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Old 09-04-2016, 10:56 AM   #5 (permalink)
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I suppose like he said you could use an OBD2A to B jumper harness.

The issue you will run into is the car end/dash end of the harness.
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Old 09-04-2016, 01:19 PM   #6 (permalink)
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The distributor and o2 sensor are Notthe only thing that needs to be rewired. The green plug and the needs to be rewired and a few other things.
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Old 09-06-2016, 06:48 PM   #7 (permalink)
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You need to use a 99-00 Harness, you can use your Y7 harness and add VTEC. You plan to use a OBD1 ECU so you wont need to add Knock. Y7 and Y8 use the same distributor so you can reuse your Y7 OBD2b distributor on the Y8.
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