Yep definitely sounds like an AFM and its a well known problem, personally I'd be ditching the pod and going back to the stock box with hiflow filter as pods can cause problems if not maintained properly.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO