Could be as simple as the checking the line running from the rear of the intake, to the crossover valve mounted on the firewall, then it runs into the ALDA. That line carries pressure from the intake and with the pressure signal from the turbo boost and when it reaches the ALDA it causes that to run more fuel into the injectors.
Could be with the engine swap that was left off somewhere. Or it could be plugged. That line very often gets plugged with oil from the intake. There is a banjo bolt on the rear of the intake, right there against the firewall. Take that out and check it to make sure it is clear. Then remove the line from the ALDA on the other side of the engine and blow though it to see if it gets pressure there. I may be disconnected somewhere betweed the two places, or it could be plugged.
For the life of me I do not remember the name of the line!