An exceedingly high heat inside the combustion chamber signifies some nitrogen oxide is produced which may harm the atmosphere. The Pontiac Grand Am EGR valve prevents the growth of NOX, or nitrogen oxides, within the chamber as well as halts it from being discharged directly into the atmosphere. The Exhaust Gas Recirculation system, or EGR, has been assisting reduction of pollution for over five decades now.

A vacuum regulated valve helps push a specific amount of exhaust back within the combustion chamber of the motor. Smog and also nitrogen oxides are decreased once exhaust levels are pushed back within the chamber. Optimum air mixture within the combustion chamber can be achieved using the EGR valve; this will help improve engine strength. A plugged EGR valve will cause problems in the performance, particularly valve knock and in certain instances, even rough idling. Automobile speed is also affected if you have a defective valve.

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