kirby 32

hi any one any ideas , i have a p1 with the 2.5 conversion and a power fc ecu recently mapped by andy forrest . well noticed today that my check engine light flickered a bit , so ran that tank of juice out , not much in it really . and refilled at diffrent shell garage . and then i was coming on to boost in third gear and hit fuel cut i think , just like hitting a brick wall , now the car wont start fires up then dies . a bit like if it was flooded . then noticed that my boost gauge pipe had come off by the boost soleonoid , put this back on and still nothing . any one any ideas? kirby32