OBD2 to OBD1, What to do about pcv?

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Old Jun 5, 2012 | 12:18 PM
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From: Vernon Texas
Default OBD2 to OBD1, What to do about pcv?

I'm using a B18B1 Motor for my swap in my EF hatch. I have a donor motor from a 93 Integra. i was simply using the parts of the obd1 motor and putting them on the B18b. I.E. Dizzy, Motor mounts, alternator, starter and so on. But I'm unsure on what to do for the PCV. I was going to use the black box on the B18a. But there is no hole cut into the back of the block for the box to go into. Can i just ditch the box all together? If i do, what am i going to do for the PCV?
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Old Jun 5, 2012 | 02:27 PM
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From: Vernon Texas
Default Re: OBD2 to OBD1, What to do about pcv?

Bumping ttt, If i can get this sorted out i can get the motor put in the car today. Thanks for the help.
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Old Jun 5, 2012 | 03:26 PM
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Default Re: OBD2 to OBD1, What to do about pcv?

I don't understand what you are doing.
You can't remove OBD2 from the motor.
OBD2 and OBD1 is the ECU.
All the sensors on your "OBD2" motor are fully compatible with the OBD1 system.
All the work you did changing parts out will result in the engine running exactly the same as if you never touched it... except now you have older parts on there for the older "OBD1" years.
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Old Jun 5, 2012 | 05:25 PM
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From: Vernon Texas
Default Re: OBD2 to OBD1, What to do about pcv?

Originally Posted by 4drEF
I don't understand what you are doing.
You can't remove OBD2 from the motor.
OBD2 and OBD1 is the ECU.
All the sensors on your "OBD2" motor are fully compatible with the OBD1 system.
All the work you did changing parts out will result in the engine running exactly the same as if you never touched it... except now you have older parts on there for the older "OBD1" years.
scratch everything i said about changing stuff over and focus only on the PCV stuff. From my understanding, The OBD1 motor got its Crank case ventilation from the hole and black box on the back of the block. The OBD2 motor gets it ventilation from a pcv valve that's near the runner of the intake manifold.

I was under the impression that i had to use the black pcv box from the B18A and use it on the B18B. But im unable to as there is no hole in the back of the b18b block. I now need to know what to do from this step. Do i run the pcv valve just like i would in a normal unmolested car? I know im making this harder then it needs to be. thanks for the help\.
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Old Jun 5, 2012 | 06:39 PM
  #5  
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From: Vernon Texas
Default Re: OBD2 to OBD1, What to do about pcv?

Never mind. I was making this harder then it has to be. Ive got it figured out. 10hrs in a shop that's 100 deg and no air flow makes ya go loony
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