[Boydness]

Thanks for all the information.
I am pretty sure that it is attributed to back pressure with the exhaust. The exhaust is not a complete factory 2-1-2 system, so I presume that the back pressure could not possibly be correct for the original EGR valve.
I was intending to replace the system with a true dual system, so what would I need to do with the EGR then?
Leave the EGR as it is and make friends with the warning light?
Or is there some way that I replace the EGR to be correct for a dual system?

I was sweating the warning light being on, but now that I understand it fully, I am less concerned with it.


Steven