Question about O2 sensor

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Oct 6, 2009 | 11:32 PM

shrini23

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Road Warrior

Joined: Sep 2009

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From: Cypress

Question about O2 sensor

I've 09 FXDC totally stock.
Placed order for the following
Python 2-1 exhaust
Arlen Ness Big Sucker stage I AC
Power Commander V

I've heard that I need to buy O2 sensor as PCV doesnt come with it.

My questions are as follows
1. Does the PCV come with O2 sensor? If it does not then do I need to buy one?
2. If I need to buy O2 sensor shoud I need to buy O2 bungs?
3. What is the real purpose of an O2 Sensor? What does it do?

The above questions might be real basic but I dont have much knowledge about it so someone pls chime in and enlighten me

Oct 6, 2009 | 11:36 PM

thedonthere

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Joined: Dec 2008

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From: Ashland Ore.

you have O2 sensors already. With the PCV, you have O2 sensor eliminators. You'll need to plug the O2 ports in your pipes or you can leave them in unpluged.

Oct 6, 2009 | 11:38 PM

shrini23

Thread Starter

Road Warrior

Joined: Sep 2009

Posts: 1,292

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From: Cypress

Quote:

Originally Posted by thedonthere

you have O2 sensors already. With the PCV, you have O2 sensor eliminators. You'll need to plug the O2 ports in your pipes or you can leave them in unpluged.

Can u pls tell me the differnce what if I plug them or what if just leave them?

Oct 6, 2009 | 11:41 PM

thedonthere

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From: Ashland Ore.

No difference really. If in the future you go with the auto tune module you'll need them

Oct 7, 2009 | 05:30 PM

SuperFastGlide

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Joined: May 2008

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From: Little Rock

i took mine off and pitched em

Oct 7, 2009 | 10:34 PM

archergodwin

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Joined: Sep 2008

Posts: 4,440

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From: Northwest

The O2 sensor allows the bike's ECM to monitor the outgoing oxygen content in the exhaust stream. It can tell what the fuel/air mixture is and adjust accordingly. The stock O2 sensors are what is called "narrow band". Meaning they monitor and adjust for a narrow band of exhaust sensing. They work just fine, and some auxiliary tuning software use them.

I believe the auto-tune feature/module for the PCV, requires or comes with, "wide band" O2 sensors.

If you are thinking about eventually getting the auto-tune feature, I would take your stock sensors out and plug the bungs.