I’ve looked all over and can’t find anyone with the same problem as me. I’ve got a 2010 cxu with the MP7 with around 320k miles. I bought it used from CIT. Had some serious boost leaks and several sensors needing replaced. It now builds 48 lbs of boost but will randomly ”pop off”, it blows a puff of black smoke out the exhaust and drops a few pounds of boost according to the gauge. I made a device to pressurize the system and check for boost leaks and also temporarily blocked off the discharge valve to eliminate it. I found and fixed an o ring leaking on the elbow coming off the turbo and the small hose at the EGR cooler. It has no codes and no mechanic has been able to solve it. Also, it does black smoke accelerating under load... which it shouldn’t... thanks for any help.