Egr Valve in Canada
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The Egr Valve works to re-circulate a portion of your car's exhaust by running it through the combustion process a second time. The end result is a more complete burn of the fuel and a decrease in noxious emissions.
Egr Valve stands for Exhaust Gas Recirculation Valve. It is vital to your car's emission controls. You will notice a rougher idle and poor acceleration if your Egr Valve is faulty. When it does go bad you must replace it.
The Egr Valve is a vacuum controlled valve that allows a specific amount of the exhaust from your car back into the intake manifold. Air mixes with the exhaust and cools the combustion process; which is good for your engine as well. This re-circulated exhaust prevents noxious gasses such as nitrogen gasses and accomplishes a more complete burn of fuel.
Your Egr Valve can get stuck. When it does you will experience bucking on acceleration and rough idle and valve knocking. Often times cleaning the clog that has built up on the valve will solve the problem. Replacing the valve is expensive, so trying to clear or clean or repair it first should be considered before immediately trying to replace it.