New to these engines need help please

[bidge_snipes]

Hi all hope all is good

I have a 2008 2.0 tfsi and it feels like it has a misfire.. have changed coils and maf sensor and also pcv but still sound like it's missing throwing no codes up and it's only on idle sound like revs are dropping but needle doesn't move now I noticed a oil leak and broken pipe on the sensor near turbo (not sure on sensor name). 

Any one shed some light? And ideas willing to try anything car owes me 800 quid so would like to get running properly and sell. 

Many thanks 

Bill

[Steve Q]

Cam sensor or crank sensor? 

Have you done a diagnostic check?