you find the problem or fix it? if not and you havnt touched a thing temp plays a big role in making boost or not. air flows slow or fast do to hot or cold air. in 17k what was the temp range of your driving? when i first got my 09 and my boost gauge in summer i was hitting 16-17-18psi. then i started adding parts and the weather got colder. i no this is ass backwords but i was added more parts and the air got colder i started hitting 14-15psi as a stock ECU should. as for idle mine is kinda crazy too, in reverse too. its a very weird car but i think its normal.
Scott-2011 WRX 335HP 394TQ 93 VF52!