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PCV Valve is an emission control and engine performance improvement element incorporated in the Chevrolet Tracker. When the PCV Valve recirculates combustion byproduct gases back into the engine's combustion chambers it does not harm the environment nor does it allow oil sludge which is a detriment to the engine to build up in the crankcase. A PCV Valve functions on the conditions of the intake manifold vacuum, whereby at idle, it restricts the gas flow so that the engine does not lean in running and at higher RPMs or under load, it allows for a higher amount of blow-by gases. This mechanism helps in fresh air and crankcase gases expulsion without any problems with the working of the engine. Furthermore, the PCV valve sits in as a flame arrester in case there is a positive pressure within the crankcase due to applications like turbo charging, backfire amongst others. Maintenance of PCV Valve is highly recommended to avoid problems such as contaminated engine oil, oil loss, and excessive fuel consumption that will cost a lot of money to be fixed.