Can the Exhaust Gas Recirculation Valve Be Cleaned?

[SanSerenity]

Yes, it can be cleaned. Carbon buildup and dirt at the exhaust gas recirculation valve can cause the valve to stick. Exhaust Gas Recirculation (EGR): Exhaust gas recirculation is a technique (or method) used in small automotive internal combustion engines where a portion of the exhaust gases is recirculated back into the intake side for re-combustion. The primary purpose is to reduce nitrogen oxides (NOx) in the exhaust gases and improve fuel economy under partial load conditions. It is commonly referred to by the acronym 'EGR,' derived from the initial letters of each English word. Symptoms of a Faulty Exhaust Gas Recirculation: During engine idle, some exhaust gases pass through the EGR valve into the engine's intake manifold. Since the amount of air-fuel mixture is minimal during idle, the recirculated exhaust gases dilute the mixture concentration, significantly affecting the engine's idle operation. This can cause the engine to idle very unstably or even stall.