Yeah I'm not sure why you lost boost? I'm kind of having a similar issue because I bought my friends 2010 Subaru Impreza WRX nice rally blue 5-speed with 109,000miles and he was screwing around with his fuses trying to fix his radio which he didn't and he had no gauges for 8 months he ended up running the car low on oil so no oil went to the turbo and he blew the turbo! So I bought it off him for $873 because that's how much he owed the shop for a complete oil change and diagnostic of the car cuz he didn't know what was wrong and didnt pay the bill didn't answer their calls so they started charging him $30 a day for having his car there so he ended up buying a brand new truck and sold me the car with the title for $873 for paying his bill and for having the car sitting there that long! When the shop diagnosed it they said that it needs a new Turbo and a new clutch so I ended up buying a OEM vf52 turbo that's new but it's not made by IHI like the stock one and I'll be lucky if I get 11lbs of boost on a good day that car should be getting 13.5 lbs of boost? I really don't think I have a leak either I think the car has great compression the engine runs really good it's an all stock 2010 Subaru WRX? Also the good thing was when I brought it to get the clutch and flywheel replaced the guy only charge me $200 instead of $1,900 because the clutch looks fine and the problem was his linkage on the firewall was so loose so he tightened it back up and the clutches fine doesn't slip or anything! But if anybody has any ideas why I'm not making the Boost I should I was thinking of maybe trying to put the wastegate that was on the ihi turbo on the new OEM Turbo or to be more simple take the line off to ihi Turbo that has the beads in it and just switch it out with my OEM One see if that makes the difference? Well I don't know if it might need a tune because I did that but it's an all stock car?