In this link you can download a file made available by SSW on the Microsoft Flight Simulator forum dedicated to both Starfigther models, single seater and trainer. It modifies the engine parameters and brings the fuel flow back to normal levels, thus solving the problem. Great job as always, guys. Thanks.
https://www.dropbox.com/s/ir36yizrnnncv38/engines.cfg?dl=0
https://www.dropbox.com/s/ir36yizrnnncv38/engines.cfg?dl=0