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96 JDM B18C doesn't use o2 Sensors???

Old 07-24-2014, 06:49 AM
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Default 96 JDM B18C doesn't use o2 Sensors???

I have a 97 Civic LX with 96 JDM B18C swap and my guy that changed my wiring harness from a stock LX harness to a SOHC VTEC harness said the JDM Integra Type R doesn't utilize o2 sensors. He also said I wouldn't need to go to the exhaust shop to get a bung installed for my secondary o2 sensor. Is this true or am I hurting performance?? Do I need both o2 sensors hooked up?


thanks,
Jeremy
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Old 07-24-2014, 10:31 AM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

He's wrong. Or maybe he's confused if the ITR sensors aren't heated or arent widband or something like that. It definitely has O2 sensors though.

If the ecu uses two O2 sensors, you need to use two O2 sensors or else use an effective bypass method for the rear sensor. The rear sensor is mostly used for cat convertor efficiency measurement and is compared with the reading from the front sensor.

Last edited by Fabrik8; 07-24-2014 at 10:34 AM.
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Old 07-24-2014, 12:13 PM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

What year is the engine from? I know my 96 only had one o2 sensor and then an EGT sensor.
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Old 07-24-2014, 12:17 PM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

Originally Posted by DonkeyPunch View Post
What year is the engine from? I know my 96 only had one o2 sensor and then an EGT sensor.
It's a 96 swap. Will not having the EGT sensor effect my performance?

Last edited by 92-CivicLX; 07-24-2014 at 12:22 PM.
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Old 07-25-2014, 07:15 AM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

this was posted on honda-tech in the it-R forum wasnt it?


it all depends on how everything is set-up what is needed. i was having fun with the thread on h-t because i dont know it all and was trying to learn more..
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Old 09-30-2014, 02:33 PM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

Hopefully you got this figured out already. Same as Fabrik said, it has nothing to do with what motor. It all depends on what ECU you are running.... but definitely, you must have at least 1 O2 sensor. OBD1 ECU reads only 1 (primary)... all OBD2 reads 2 (primary and secondary).
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Old 10-07-2014, 09:32 AM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

isnt the B18c just the jdm gsr motor anyway?
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Old 10-19-2014, 05:36 PM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

the stamp "B18C" is found on both JDM ITR and JDM GSR. These JDM motors doesnt have the "1" or the "5" like USDM has.
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Old 10-21-2014, 03:38 PM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

I think my B18C is a 98ish, No O2 sensors.
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Old 10-21-2014, 04:10 PM
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Default Re: 96 JDM B18C doesn't use o2 Sensors???

Originally Posted by jarrett2k View Post
I think my B18C is a 98ish, No O2 sensors.
It had no O2 sensors if you removed them and then reprogrammed the ECU to run an open-loop engine management strategy, otherwise you're confused. You probably just forgot where they are.

It had at least one.. If it was a USDM it had two. If it was JDM it might have only had one. Some years or models had one/both on the cat instead of the header, can't remember which is which. I can't remember when the JDM OBD2 went from one to two sensors.
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