I need help!!!!!

[08spartan250]

Ok, my truck is an 08 F-250, and I'm running the Spartan 310 tune. I was driving, and gave it some gas at about 3/4 throttle and it did fine. Then I let off the gas and came to a stop light, and when I tried to go again it was running really sluggish and not near the power I was getting. Now the truck isn't building boost like it should be. Its not building up any boost from a dead stop, but will eventually get some as it gets going. So from what I can think is that the smaller turbo just isn't spooling up anymore. So I dont know what it is or what I can do to fix it. And I really dont want to have to return everything to stock and try to get a dealership to fix it. So any help would be appreciated!!!

[Coffaro]

Might not be the same thing that I had but I was able to load the stock tune the reload the spartan tune and it worked for me.

[08spartan250]

i tried returning it back to the stock w/ DPF off and its doing the same thing. i called spartan and they think i blew a hole in one of the intercooler tubes. so now i'm trying to find it.