Hi, guys

I’ve recently had my MY02 WRX TEK2’d and now get this strange crackling noise

It happens most often on part throttle (off/low boost), when I accelerate (starting at lowish revs). Doesn't (seem to) happen at high boost though

I switched maps (to low boost) and still did it

Oh, yea I’ve also had the CEL come on, surely this couldn’t be because it’s deting????

What does deting sound (feel??) like???? am I being paranoid????