STRONG FUEL SMELL``
 

as above strong fuel smell coming from zorst also white smoke/steam as well .it smells as though it is runing really rich :wonder:

bttt

if it smells like really rich i would get it down local mot centre and get it put on gas analyzer to see what the emissions are

if it is running rich sounds like a trip down subaru to get it plugged in to see if any sensors giving dodgy readings

That sounds suspiciously like failure of either an injector (stuck open) or (very much more likely) the failure of a lower injector seal.