Good afternoon, This is my first entry so please correct me if I am doing something wrong. I have a 2010 stock wrx that I recently replaced the turbo with a vf52. I had a tuner on site to install my Access Port and write a new map. We made several pulls in 3rd gear from 2,500 rpm to 6,000 rpm as he modified the map. On our final pull, a rolling 1st gear, full throttle to 6,000 rpm, a distinct whining sound began and boost dropped to zero. The car still runs but upon acceleration, more whining and zero boost pressure. Boost was increased from 13.5lb to 16.5 lb during the tune.
I visually checked split hoses, loose clamps, obvious air leaks while the engine was at idle and found nothing. I pressure tested at the air intake in front of the turbo and sprayed with soapy water. No bubbles. I pressure tested the intercooler. No leaks. I pressure tested after the intercooler. No leaks. I have used the factory BPV and installed a new turboxs BPV without change. I have checked the factory boost gauge and it matches the psi from the compressor. I have re-installed the turbo, make sure of all connections and gaskets are in place.
Any suggestions? If it is something more complicated than I can handle, I do not want to take it to a shop until I have narrowed down the source to prevent the gouge that I can already feel coming.