Burned up piston!!! Need help!

[2000powerstrokin73]

I've got a 2000 powerstroke that I picked up a month ago. Thought there was an injector bad. Tested the injectors one came back bad. So i change that injector out still no change in motor power and still a little smoke. Took it to a diesel shop and the ran it through some test and come to find out they are thinking a hole in a piston!! So I am in need of some advise on what direction to go. And where can i get good parts cheap!! thanks Andy

[NoRalPh]

A hole in the piston would be hard to miss though....

Did they decide this based on a compression check?

Do you have outrageous blow-by?

You feel the "studder" of running on 7clys now?

[2000powerstrokin73]

From what I was told the compression check came back weak in #5 cylinder and the injector was bad. So i told them to change the injector out and when they took the injector out they said the tip was gone. Thats when they told me i had a piston problem. I'm not a diesel machanic but the price they shot me to fix it was crazy. Im gonna do as much work myself as i can.