thats exactly how it feels. I think problem is intermittent and as car generally pulls hard problem only really happens when I back off throttle change gear its at this point the symptoms usually appear for a few seconds then you can hear it fix itself as the noise goes back to how it normally is .
like i stated in an above post I tested the egvc with some comnpressed air and it freely moves in and out so that rules a mechanical issue with the actual valve. I also tested the vsv that feeds it and its is within spec, i also applied 12v to it and it opens and closes as it should.
so the issue is furher up the line .
I gotto verify if the boost controller is connected properly .