B18C1 obd1 to obd2
USDM OBD2 B18C1 into 97 DX...will be using OBD1 ecu
10-25-2010, 04:45 PM
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Re: B18C1 obd1 to obd2
no, and I would just use your dx harness. For the VTEC/Knock/IAB wiring check my signature below. The 99-00 Si harness will not have all the ECU plugs so it will be easier to use your harness and wire up the extra wires.
You can use the OBD1 injectors:
And "trick" the CKF:
http://www.ff-squad.com/technet/ckftrick.htm
Also you can use the OBD1 alternator as well:
You can convert the dizzy by using a distributor harness adaptor or just sell that one and use an OBD2 distributor:
You're going to have to convert the IAT connector over from the square style plug to the round style (round style IAT pictured in the first picture below, second pic is the square style connector) or put the IAT in your intake arm:
Convert your Idle air control valve from 3 to 2 wire:
Also you'll need to extend your O2 sensor to have one before the cat and one either after or in the cat:
You can use the OBD1 injectors:
And "trick" the CKF:
http://www.ff-squad.com/technet/ckftrick.htm
Also you can use the OBD1 alternator as well:
You can convert the dizzy by using a distributor harness adaptor or just sell that one and use an OBD2 distributor:
You're going to have to convert the IAT connector over from the square style plug to the round style (round style IAT pictured in the first picture below, second pic is the square style connector) or put the IAT in your intake arm:
Convert your Idle air control valve from 3 to 2 wire:
Also you'll need to extend your O2 sensor to have one before the cat and one either after or in the cat:
10-26-2010, 08:08 PM
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Re: B18C1 obd1 to obd2
Thanks for the info. I will be going with obd1. It seems to be the logical route. I'd like to use my stock 97 dx ewh...do you have a link or write up on the mods I need to make on it to use with the obd1 b18c1? I will also be using a chipped p28 obd1 ecu with a obd2-obd1 jumper harness. Thanks again!
10-26-2010, 08:15 PM
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Re: B18C1 obd1 to obd2
I just went to your website...I realized that I already purchased a vtec oil pressure switch from you...looks like I could also use your Honda Acura OBD1 VTEC GSR conversion swap subharness on ebay. Would that apply to my situation?
10-27-2010, 02:17 PM
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Re: B18C1 obd1 to obd2
Yeah that'll work perfect, you'll still need to follow the above pictures on the alternator/distributor/IAT/IACV/injectors/primary O2 only extended
11-02-2010, 12:11 PM
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Re: B18C1 obd1 to obd2
So it turns out that the motor I'm swapping is in fact a OBD2 96 GSR B18C1. I am still going to run the motor on a OBD1 chipped P28 via a OBD2 to OBD1 conversion harness. I picked up a VTEC/Knock/IAB wiring subharness to add to my OBD2 DX harness. My distributor and alternator plug issues are now resolved (all OBD2 plugs)...
So I guess the only thing left is to modify the IAT, IACV, CKP, extend one O2 sensor wire...Am I missing anything?
So I guess the only thing left is to modify the IAT, IACV, CKP, extend one O2 sensor wire...Am I missing anything?
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11-02-2010, 12:39 PM
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Re: B18C1 obd1 to obd2
Since I'm running a OBD1 ecu, do I even need to worry about the CKF/CKP (crank sensor) even though the crank sensor is integrated on the oil pump in all US OBD2 engines? Thanks again on all the input...
03-07-2011, 06:01 AM
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Re: B18C1 obd1 to obd2
Im currently trying to convert my obd1 motor (ls/vtec b18a with gsr head)to work with my obd2a harness/car (97 civic cx). I want it to run with no CEL's with an obd2a ecu soley for emissions purposes only..I plan on running the already tuned obd1 ecu for everyday (with a jumper harness of course)
As of right now my list of parts/issues to address is:
-Dizzy conversion harness for obd1 to obd2
-I need a new alt. anyways so im going to buy an OEM obd2 alternator
-IAVC plug conversion
-IAT sensor
-CFK trick or I might just buy a fresh OBD2 gsr oil pump (could I reuse my D16y7 crank sensor?)
-your o2 extension
-your vtec wiring kit
what else am I missing?
As of right now my list of parts/issues to address is:
-Dizzy conversion harness for obd1 to obd2
-I need a new alt. anyways so im going to buy an OEM obd2 alternator
-IAVC plug conversion
-IAT sensor
-CFK trick or I might just buy a fresh OBD2 gsr oil pump (could I reuse my D16y7 crank sensor?)
-your o2 extension
-your vtec wiring kit
what else am I missing?
Last edited by project_bluff; 03-07-2011 at 01:38 PM.
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