# Honda swap ?'s
**URL:** https://forums.speedlife.net/t/honda-swap-s/254663
**Category:** Shift518 Automotive
**Created:** [September 23, 2010, 7:15am UTC](https://forums.speedlife.net/t/honda-swap-s/254663 "2010-09-23T07:15:22Z")
**Posts on this page:** 18
**Page:** 1
### Author:  [@imported\_ST4TUS](https://forums.speedlife.net/u/imported_ST4TUS)
#### Post date: [September 23, 2010, 7:15am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/1 "2010-09-23T07:15:22Z")
One of my friends is trying to finish up his swap.
The ECU was stolen among other things while the car was in storage.
Instead of replacing the ECU, he bought a Hondata s300 equipped ECU
- After looking over the car, my best guess was that the map that he loaded
to the s300 was no good. Idle was perfect, but I didn’t want to drive the car
with less than perfect timing etc
- '00 Civic Si
- HMotors B18c (OBD2a)
- Civic EX (w/vtec) wiring-harness
- STOCK with ITR exhaust
- Hondata s300 ECU with jumper (OBD2 to OBD1)
Should we run the EX harness to a new p72 and be running smoothly?
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### Author:  [@psi2high](https://forums.speedlife.net/u/psi2high)
#### Post date: [September 23, 2010, 7:28am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/2 "2010-09-23T07:28:05Z")
Yea as long as you have a vtec harness it should be fine
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### Author:  [@GermanPSI](https://forums.speedlife.net/u/GermanPSI)
#### Post date: [September 23, 2010, 7:29am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/3 "2010-09-23T07:29:36Z")
Load another map, hondata offers a bunch of base maps
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### Author:  [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [September 23, 2010, 7:36am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/4 "2010-09-23T07:36:11Z")
You should just get the OBDII P72 and be done with it. Without having additional modifications, there is very little (if any) to be gained from a chipped ECU. If you were running boost, the story changes obviously. If you want to use an OBDI ecu with an OBDII B18c you need to change the IAB wiring as OBDI ecu will apply ground and OBDII ecu will apply power in order to activate the IAB solenoid. Otherwise you could just forget about the IAB setup and not have the midrange power increase that comes with it working.
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### Author:  [@imported\_ST4TUS](https://forums.speedlife.net/u/imported_ST4TUS)
#### Post date: [September 23, 2010, 7:53am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/5 "2010-09-23T07:53:30Z")
> [@Pray for bills te kevin everett](https://forums.speedlife.net/t/pray-for-bills-te-kevin-everett/35083/80):
>
> Yea as long as you have a vtec harness it should be fine
Thought so, glad I asked though
> [@Best IPhone compeditor?](https://forums.speedlife.net/t/best-iphone-compeditor/35172/47):
>
> Load another map, hondata offers a bunch of base maps
I was thinking about doing this for him…He has a brand new PLX Wideband too we could use if he keeps the s300 vs stock ecu
> [@Favorite Insult?](https://forums.speedlife.net/t/favorite-insult/35233/18):
>
> You should just get the OBDII P72 and be done with it. Without having additional modifications, there is very little (if any) to be gained from a chipped ECU. If you were running boost, the story changes obviously. If you want to use an OBDI ecu with an OBDII B18c you need to change the IAB wiring as OBDI ecu will apply ground and OBDII ecu will apply power in order to activate the IAB solenoid. Otherwise you could just forget about the IAB setup and not have the midrange power increase that comes with it working.
I think that’s what we are going to do for now. Just get the stock ECU, and down the road
swap in the jumper/s300/wideband/tune. No point in it now, being bone stock etc. but Im looking for a OBDII P72 so we
get the IAB.
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### Author:  [@imported\_ST4TUS](https://forums.speedlife.net/u/imported_ST4TUS)
#### Post date: [September 23, 2010, 8:37am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/6 "2010-09-23T08:37:43Z")
Car = OBD2 **A**
Motor = OBD2 **B**
So I need an OBD2 **B** P72 correct?
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### Author:  [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [September 23, 2010, 9:59am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/7 "2010-09-23T09:59:22Z")
Stick with whatever the car is wired for as the connectors are different at the ECU.
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### Author:  [@Hang\_Your\_Cross](https://forums.speedlife.net/u/Hang_Your_Cross)
#### Post date: [September 23, 2010, 10:05am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/8 "2010-09-23T10:05:54Z")
wouldnt the car be an obd2B since it’s an 00?
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### Author:  [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [September 23, 2010, 10:06am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/9 "2010-09-23T10:06:11Z")
Actually, now that I think about it… run an OBDIIa ECU. You don’t want to run into immobilizer issues here…
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### Author:  [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [September 23, 2010, 10:07am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/10 "2010-09-23T10:07:56Z")
> [@Favorite Insult?](https://forums.speedlife.net/t/favorite-insult/35233/25):
>
> wouldnt the car be an obd2B since it’s an 00?
Yea, but the engine harness would really determine that. It looks like the wiring harness is from a different vehicle, so if its wired for OBDIIa he should get the OBDIIa ECU. Regardless, the immobilizer is a pain in the balls so I would avoid it without the correct wiring and sensors on the motor side of things.
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### Author:  [@psi2high](https://forums.speedlife.net/u/psi2high)
#### Post date: [September 23, 2010, 1:16pm UTC](https://forums.speedlife.net/t/honda-swap-s/254663/11 "2010-09-23T13:16:47Z")
You would need an obd2b for that car
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### Author:  [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [September 23, 2010, 1:34pm UTC](https://forums.speedlife.net/t/honda-swap-s/254663/12 "2010-09-23T13:34:38Z")
I would still do OBDIIa with a jumper harness if it’s wired for B. Fuck the immobilizer.
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### Author:  [@Sady](https://forums.speedlife.net/u/Sady)
#### Post date: [September 23, 2010, 1:45pm UTC](https://forums.speedlife.net/t/honda-swap-s/254663/13 "2010-09-23T13:45:37Z")
> [@Automatic to Manual Swap?](https://forums.speedlife.net/t/automatic-to-manual-swap/35241/14):
>
> Fuck the immobilizer.
Quoted for the truth.
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### Author:  [@imported\_ST4TUS](https://forums.speedlife.net/u/imported_ST4TUS)
#### Post date: [September 24, 2010, 5:57am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/14 "2010-09-24T05:57:17Z")
> [@im never buying grapes again](https://forums.speedlife.net/t/im-never-buying-grapes-again/35236/27):
>
> You would need an obd2b for that car
Thanks man, now Ive just got to find one to borrow for a minute
> [@Automatic to Manual Swap?](https://forums.speedlife.net/t/automatic-to-manual-swap/35241/14):
>
> I would still do OBDIIa with a jumper harness if it’s wired for B. Fuck the immobilizer.
Not trying to buy another jumper to go B to A…if its the only remaining option, maybe
Is there a way to bypass the immobilizer? Ive seen “mobilizer” chips for sale, but Im
hoping there is a better way.
Thinking about just loading a new map on the Hondata at this point
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### Author:  [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [September 24, 2010, 3:18pm UTC](https://forums.speedlife.net/t/honda-swap-s/254663/15 "2010-09-24T15:18:08Z")
If you want a CEL to be on 24/7 you can bypass it, otherwise I don’t know of any real fix besides running OBDIIa.
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### Author:  [@psi2high](https://forums.speedlife.net/u/psi2high)
#### Post date: [September 24, 2010, 4:52pm UTC](https://forums.speedlife.net/t/honda-swap-s/254663/16 "2010-09-24T16:52:53Z")
I thought all cars 99 and up were obd2b
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### Author:  [@Hang\_Your\_Cross](https://forums.speedlife.net/u/Hang_Your_Cross)
#### Post date: [September 24, 2010, 7:12pm UTC](https://forums.speedlife.net/t/honda-swap-s/254663/17 "2010-09-24T19:12:49Z")
> [@gunked plugs, but thats not the problem](https://forums.speedlife.net/t/gunked-plugs-but-thats-not-the-problem/35265/5):
>
> If you want a CEL to be on 24/7 you can bypass it, otherwise I don’t know of any real fix besides running OBDIIa.
there was a how-to on honda-tech a while back. you take out the circuit and replace it with a specific transistor.
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### Author:  [@imported\_ST4TUS](https://forums.speedlife.net/u/imported_ST4TUS)
#### Post date: [September 27, 2010, 6:30am UTC](https://forums.speedlife.net/t/honda-swap-s/254663/18 "2010-09-27T06:30:23Z")
So, its looking like a reflash to the Hondata…