غالبا دي المشكلة الشائعة في الجولف 4 وهي مشكلة ال egr
[youtube]http://www.youtube.com/watch?v=8YRq2Xl58Oo[/youtube]the exhaust gas recirculation (egr) valve in your volkswagen�s emission control system is the main component in the egr system. The volkswagen egr valve opens a small vessel between the manifold and exhaust, providing the backflow of a metered amount of exhaust.. The common symptoms of a damaged egr valve are engine knock, reduced performance, poor gas mileage, and excessive emissions. Volkswagen .
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