But There is no reason to replace a part that has not been deemed bad. That's the main problem I have with your suggestion. I don't mean to sound rude or unappreciative but I need help that is based in logic. Not just swapping a part because that's your guess.
Again did you diagnose the back pressure EGR system correctly? Its not about a guess. Its a guess on how many other parts you want to blame/swap and none fix the problem. I try to help.
