A few weeks back I noticed my 2015 Fiesta ST seemed slower than normal, it doesn't put me into the seat like it used to when accelerating hard. I suspect this may be a boost leak or similar issue so I took the car into my local dealer Kings Ford. They said they couldn't find anything wrong but the guy that talked to me said they found no codes, so sounds like all they did was check the odbII codes. I know these cars don't throw codes for boost leaks so I'm guessing they didn't do any actual pressure tests or diagnostics. I have a bluetooth odbII scan tool and the torque app on my phone so how much boost should I be seeing on a stock FiST in 3rd and 4th gear? Also how soon in the rev range does the turbo make full boost?