Ok so about 3 weeks ago my 7.3 idi 2X4 auto just stopped running and would not start at all. I got a diesel mechanic to look at it and he said the IP was bad and so i took it to a reliable diesel shop locally to have them rebuild it. After the mechanic installed the rebuilt IP the truck was hard to start and ran about 5 min and died. Today i tried to start it and it started 2 times and it ran for 1 to 2 min tops each time and had white smoke out the exhaust. Any ideas on whats going on? Oh and the truck use to start first time no problems warm or cold prior to the truck dieing on me 3 weeks ago. Any help or suggestions i am thankful for.