i just bought an 03 wrx and i have a couple questions. i noticed that i have a little hesitation around 2500 rpm at low throttle. also i noticed it idles low, around 5-600 rpm. im new to subarus and i was wondering if this was normal idle, and if the hesitation was from a boost or vacuum leak? any ideas? also ive noticed that the valvetrain ticks kind of loud, it sounds like i might be low on oil but i checked it and the level is fine. is that normal for it to tick a little?