c3.4 misfire and blues smoke

have a 2012 caterpillar 262c2. it has the c3.4 in it. TMW is the serial prefix. Here is the issue when engine is cold runs perfect starts fine. Once it is at operating temp it will run at high idle anything over 1600 rpms for about a minute and began to slow down and begin sputtering and blowing blue smoke. already replaced the turbo. cracked injector lines and low and high idle. replaced transfer pump. I already know that the tank and fuel lines are good. does anyone have any other ideas on this. there are no service codes. all cat trouble shooting leads to nothing.