[s-cars] Boost Cut-out, now NO boost

[RM]

Thanks for the replies so far! I just redrove the car again and the
following is now the issue. It still cuts out at times. However, when it
doesn't cut out, it runs about as strong as a 86 Audi 5000 turbo... kinda
just flat. If i pop the hood and wing the throttle, i do hear a hollow kind
of air noise from the air box. I'll put it on the lift tonight and look for
any split hoses of some sort, but it almost feels as though there is a part
of some sort that is only partially working at times. Is there a common
cause of low boost/ cut outs?

Rolf