Turbo whisling

[Dcolumbia]

I fixed that leak and the whisling noise was gone, ran great but was still losing coolant from the egr cooler. So ended up taking the turbo back off to fix the cooler issue. I had a brand new turbo gasket sitting with the new exhaust manifold gaskets and for some reason, could not find the gasket, so I had to reuse the existing gasket. Figured I would replace it when I got home the next weekend. Now I have not been able to get to it and the truck has been running great for the past couple weeks but I still suspect a turbo leak somewhere. Today the truck just would not boost past 30 to 34 and has less power than yesterday. And pulling some hills, it skips, kinda feels like it isn't getting fuel for a split second then comes right back. Now it isn't always boosting with the Jake's and throwing a code when it doesn't. Threw the code for 9 counts up and down 75 from Kentucky to 26 in North Carolina. Any ideas before I go and buy a new turbo?