Few things to try;
1 - Reset the battery, take negative off and press brake pedal. Replace and try again.
2 - Clean the MAF sensor, remove from intake, spray with electrical contact cleaner, allow to dry, replace and test
3 - Log fuel pressure with AP and post logs
4 - I know this is pretty generic, but check hoses and clamps. Particularly the air intake, and the two hoses to and from intercooler (behind and infront). Make sure they are tight but not over tightened and that the movement has not loosened or moved the hose closer to the lip of the pipe.
MY16 WRX STi Crystal White Pearl
-= Rally Armour Flaps - 2XS Muffler Delete =-
FG FPV F6 MKII Vixen - SOLD
-= Bluepower SRI - ID1000 Injectors - Venom Cat - XCAL3 - ProcessWest Stg2 Intercooler - 359 RWKW=-
CX9 Grand Touring Stormy Blue
-= The rolling armchair =-
6 MPS Velocity Red - SOLD
-=Cat Back Exhaust - Pirelli PZero=-
3 MPS Aurora Blue - SOLD
-=PG SRI - PG Inlet - ETS TMIC - GFB Hybrid BOV - Best Mufflers DP - Eibach Pro - AccessPort STG2 - Autotech HPFP - ITV22 - Michelin PSS=-