Originally Posted by woodsboy
No, I have not adressed the EGR issue yet, for the simple fact that I was told it might not be this. And to answer rtg143 it feels like its coming from the engine not really the drivetrain. Its also weak on power for a v-8 it will range from acting like a weak butt 4 banger to a stout v-6. Could the EGR be doing this?
The only reason I questioned you there was because in your first post you made it sound as if the EGR issue was in addition to the misifire codes when you ran your diagnostic check.
Considering the EGR valve is engine-related and can cause running issues if it is clogged or not functioning properly I would say YES it is possibly the cause. Inspect the EGR tube for cracks and use vacuum to test the functionality of the valve.