The most common culprit is carbon buildup on the throttle body, exhaust gas recirculation (EGR) valve and idle air control (IAC) valve. Here well show you how to clean an EGR valve.

Downhill runs were improved, too, because the increased back-pressure required by EGR to push the hot exhaust back through the recirculation system also makes it possible to boost engine brake ...

Read about Diesel Tech's EGR bypass kit for a 6.0L Powerstroke engine, only on dieselpowermag.com, the official website of Diesel Power Magazine.