A pesky little emissions device that can cause your truck to run poorly is the EGR valve. Unlike many of the components that go bad on the 6.0L, the EGR valve is very easy to replace. This little valve causes all types of problems that cause your truck to sputter, blow large amounts of black smoke, and perform poorly. They are prone to stick and carbon up due to excessive idling of the vehicle. This video will guide you through the details of R+R and diagnosis of an EGR valve.