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emissions test are performed ona vehicle at operating temperature.
cat converters help clean up the remaining CO, HC and NOx in the exhast.
PCV takes the blow by gasses in the crankcase (such as those going by your worn rings) and allows them to be sucked back into the intake, to be burned off.
disconnecting the psv valve is technically illegaly, and if at an honest smog station will result in a failure, for a deactived/tampered emission control device.
A smog consists of visual check of emissions equipment and a functional testing of them.
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