Is there no engine lights on? Could be the MAF sensor, could be the idle control valve, could be fuel pump issue.
No warning lights at all. In the past I have had a ‘Depollution System Faulty’ message. It’s appeared 2-3 times since April 2017. You can clear it by turning the car off and back on quickly! The car drove fine with the message showing. ‘Depollution system faulty’ seems to be a catch-all code that covers all systems that help control emissions (EGR, EVAP). I’m hoping the intermittent message, fuel smell and cutting out are all related!