Have you pulled the injectors and verified that they work? Sounds more like a timing issue, have you verified the distributor is clocked properly? What do your spark plugs look like?
The problem with this is that turbo i4's are inefficient. Been through enough blown turbos or turbo-related problems with other cars to understand that they aren't worth it. (Several turbo'd Subarus, a GTi, and a newer BMW). EngineeringExplained makes the best case against small turbo'd motors...