Please read this thread, particularly page three, my last reply. My 4100 died this morning, all the details are at the link below. Good news is that was probably one of the only 4100 series users, the 4200 has internal differences/upgrades to the bypass system that will hopefully make a difference. Email or PM if you have any questions and or concerns that I might have missed. Please read the thread below first, think I covered it fairly well.
https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=39789&perpage=15&pagenumber=3
Scott W.
https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=39789&perpage=15&pagenumber=3
Scott W.