Twin turbo blowing air out the inlet

[MoeHorsePower]

I need some help from you turbo guys, primarily twin turbo, a customer brought me a twin turbo Impy, the problem is at idle each turbo takes its turn on blowing pressure (air) out the turbo inlet, even when you drive, it sounds like 18 wheelers setting their air brakes one after another, any idea why this is, and of course it will not rev mid throttle, like its fighting itself, Ive tuned twin turbo before without any issues, especially like this one..Thanks again.