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breather filters
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<blockquote data-quote="04CobraMatt" data-source="post: 5562623" data-attributes="member: 44530"><p>running a breather on the passenger side will never affect the WOT a/f because the PCV valve being closed.</p><p></p><p>It will mess with your STFT during ClosedLoop driving because of un-metered air sucked in through the PCV system. In reality, if you did install a breather your car will still run fine because the PCM uses feedback from the o2 sensors to correct the ClosedLoop a/f. If the air gets really really dense it may go beyond the ability of the PCM to correct and go a little lean during ClosedLoop only.</p><p></p><p>You could have the car re-tune for that un-metered air so your STFT are closer to normal, but at the end of the day un-metered air is un-metered air. The ClosedLoop A/F ratio (14.7) will never be as precise.</p></blockquote><p></p>
[QUOTE="04CobraMatt, post: 5562623, member: 44530"] running a breather on the passenger side will never affect the WOT a/f because the PCV valve being closed. It will mess with your STFT during ClosedLoop driving because of un-metered air sucked in through the PCV system. In reality, if you did install a breather your car will still run fine because the PCM uses feedback from the o2 sensors to correct the ClosedLoop a/f. If the air gets really really dense it may go beyond the ability of the PCM to correct and go a little lean during ClosedLoop only. You could have the car re-tune for that un-metered air so your STFT are closer to normal, but at the end of the day un-metered air is un-metered air. The ClosedLoop A/F ratio (14.7) will never be as precise. [/QUOTE]
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