Hello mate , I had that same problem a few months back, it had something to do with my fuel lines around the fuel Pump, one of the seals had perished , so the kid who does my car took it out and put it in a cup of boiling hot water then refitted it, and I swear to god it fucking worked,


If I read correctly it only happens when it comes on heavy boost, if so then that is exactly what happened to mine.

Hope its been a help and honestly I m teling the truth