Thread: Catch Can Help
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Old 06-18-2013, 09:40 AM   #36
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Drives: 2012 Camaro RS, RX supercharged
Join Date: Dec 2009
Location: Bradenton, FL
Posts: 6,068
Correct. You don't want unlimited unmetered air entering or the MAF is telling the PCM one set of data, the MAP another, and the upstream O2's a 3rd and if they are not within the parameters the PCM expects, the fuel trims go nuts as the PCM tries to adapt.

The RX breather has a flow controlling valve to only allow in an amount the PCM can adapt to.

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