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The Family Handyman on MSNHow to Test and Clean an EGR ValveThe most common culprit is carbon buildup on the throttle body, exhaust gas recirculation (EGR) valve and idle air control ...
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What Is An EGR Valve And How Does It Work In A Diesel Engine?the EGR valve operates based on your current driving conditions. When you start your car and when you're driving at high speeds or accelerating, the engine requires more clean air to run smoothly.
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