Quote:
Originally Posted by Turdinator
The stock PCV system pulls air from after the MAF so it is both filtered and metered.
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It was metered and filtered. Then it went through the cylinder. It is essentially exhaust gases that get fed back into the intake manifold. The intake manifold has a hole. Disconnect the hose and unmetered air is getting sucked into the manifold. Connect the hole to exhaust gases, and you have the EGR system. Connect it to blow by gasses from the crankcase and then you have the PCV system. This air is compensated (predicted) by the computer, but not measured. Read the EGR article. Sounds a lot like the PCV system.
https://en.m.wikipedia.org/wiki/Exha..._recirculation
Quote:
EGR is typically not employed at high loads because it would reduce peak power output. This is because it reduces the intake charge density. EGR is also omitted at idle (low-speed, zero load) because it would cause unstable combustion, resulting in rough idle.
Since the EGR system recirculates a portion of exhaust gases, over time the valve can become clogged with carbon deposits that prevent it from operating properly.
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