It's a massive issue on the 370z
It happend to me on the stock car
Since litchfeild mapped mine for forced induction the cut was violent as they mapped a fail safe in.
it will just shut the ignition/throttle off should it see lean running it's horrible but saves it running lean on full chat
Swirl pot sorted it tho
As Alex says experiment with different fuel levels and see what gives
Just play on light or almost no throttle tho so it's not on full chat if problem returns