After replacing all solenoids, lines tanks testing all actuators and replacing all check valves i am still loosing boost at transition, logged it in datalogit all seems to operating correctly on the tcn and ccn. I have double and triple checked everything and i am starting to suspect PFC is playing up. Any ideas??

 

I had same issue. Secondary won’t kick in after 4K rpm. Found out the signal wire from ecu to secondary injectors were disconnect somewhere. I ran new wire and the secondary is back!