Can any one give me any any pointers on this, driving car today (sti v2 wagon) and overtook another car droped to 3rd bootfull for fun and only hit 0.5 bar boost, felt cack tried in 4th same again no cel or strange noises so stopped turned off and restarted it all fine, quick test in 2nd 3rd 4th and all is well again 1.2 bar holds 1.1 to red line felt great could it just be a hic-up or poss problem, car has been mapped about 18 months ago esl live,fmic,full stainless de-cat down pipe straight through mid pipe magnex back box all has been mint since re-map other than knock sensor failure few months ago has been replaced with new genuine subaru sensor and reset ecu to clear code after no new codes and no boost leaks hope some one may have a clue before i start digging

 

Boost control solenoid maybe needs flushing through to clean it out

https://www.scoobynet.com/technical-...-solenoid.html

 

Did you get this sorted out? Mine is doing something similar