The Family Handyman on MSN1y
How to Test and Clean an EGR Valve
The most common culprit is carbon buildup on the throttle body, exhaust gas recirculation (EGR) valve and idle air control ...
What Is An EGR Valve And How Does It Work In A Diesel Engine?
Since the engine burns fuel at a lower temperature while the EGR valve is active, less nitrogen-oxides are produced, ...