So I'm stage 2 with a base tune for stage 2. I've sent logs in but have not received feedback or revisions yet. The main issue I'm having is surging at around 3/4 throttle above 4500-5000 rpm. Roll on the throttle getting on on-ramps and stuff and the car surges up and down. I've read things like wastegate actuator and things like that. Is that something controlled by the ecu and could be addressed with a revision? I don't notice it in normal driving or during wot.