Yo at one point my car would not idle in neutral (without constantly tapping the gas), would not even boost. Took it to Ben at KYP he just grunted and replaced some things fixed it in about 10 minutes and charged me $35.00.
Prior to that I tried all other solutions, AFM cleaning/replacing with brake fluid, tightening my bov, checking cooler piping. Best bet is to take it to a reputable shop, tell em your problem and they will fix it.
Unless your car just needs a tune ....