Bad smell out of exhaust

[Vidma]

Hello my m119 has this like fuel/oil smell out of the exhaust why could that be?

 

[R129 UK]

Need more details, all the time, on cold start etc.?

Any sign of steam or smoke etc.? If so, what colour?

 

[Vidma]

Worst smell is on cold starts if i get any smoke its always mainly condensation because a lot of water drips out

 

[emerydc8]

That condensation could be normal depending on temperature and humidity. Also, the catalytic converters don’t really become effective until they are hot so you could smell strong CO/NOx fumes on a cold start. I think there is still an unsettled question here as to whether the AIR pump dilutes the fumes on a cold start or simply causes the converters to warm up more quickly with added oxygen. IIRC there is also an open-loop condition until it warms up to temperature.

 

[Vidma]

Later my oil starts smelling like petrol