As the title says really. My old 200sx did this sometimes, but it wasnt tuned that well. Should it even be possible to hit fuel cut in a standard 05 ppp wagon? I changed up to third at high rpm, hit wot, and it was like someone threw a ten tonne anchor out the rear hatch!

 

Check boost pipes,one might have blown off or split.
Also check intercooler pipework for the same.

 

Cheers, ill have a look. Cars run fine since tho. Tried to recreate the circumstances but nothing abnormal happened. I just thought the prodrive ecu would be well within the parameters of the fuel cut.