good evening yall. have not been here in years, looking for a little help. so a buddy of mine has a gen2 v that has a very strange boost surge issue @ wot. car has a build motor, e85 , manual trans. it was tuned a year ago, at some shop far away. so here goes- when you go wot , it starts to build boost and what i can tell so far is the boost solenoid turns on a dumps the boost.. when the boost drops back to low 20ish, the actuator closes and it builds boost again, then dumps. cycle repeats. vehicle drives great besides that. can someone take a glance at this for me.. thanks
p.s car was fine for months after he got it back from the shop that built and tuned it.