if the pistons had already been detted it would have smoked out of the breather and the exhaust, made insufficient power
crank case pressure issue would have been obvious even to a kitchen fitter causing the turbo pressure differentials seals to pass oil into either the compressor or the turbine end or both
I'm sure if this had been the case moonstone would have been on the phone complaining about the new 1200 quid t4 I had just sold him
when we map a car we carry out basic engine checks before we do anything
1 cylinder leakage check
2 pressure drop tests
3 coolant gas sampling and coolant system pressure drop check
4 fuel pressure check
and a fair few more
I'm sure most of the top tuners do the same
It has already been established that the missing power was not due to stu's off the shelf chip it was the fact the car had no boost
stu;s maps have the correct spark advance and fuel duty cycle for upto 2.2 bar and 500+ bhp
IMO you should have left stu's chip in and just fixed the boost leak
How can you blame the owner he is a kitchen fitter you and luke boast how you are tuning gods not seen moonstone boasting