Originally Posted by FasterIsBetter
No hoses should be disconnected. Send a pic of them and their location exactly and we can tell you what they're for.
He did the vac tank bypass and left the tubing loomed, I bet.
OP: Like Faster says, I'm betting it's your fuel trims. Check for boost leaks, then get tuned for the mods and see what that does, or go back to the stock airbox and see if that helps.