Dear members,

I have a L405 2013 with the SCV8 engine. After fuelling, the engine cuts once. So I ignored it and when further for a 3 hours drive.
Engine cuts now after every stop. And when cold, it shakes and black smoke from exhaust. It runs very bad on cold startup and back fires and stalls. After a minute idle is normal again but with loss of power. So the acceleration takes longer to reach 100km/h and maximum speed at 130km/h.
fuel rail pressure jumps from 5 bar to 50 bar the whole time. If the throttle pushed for a second then you can see the dropping of fuel pressure and then it gains to 260 bar nearly. This makes al loud sound coming from the shaking fuel rail.





Already changed:
- low fuel pump
- filter
- high pressure fuel pumps 2x and buckets.
- fuel pressure sensor on gallery.
- engine ecu
- wiring from hight pressure pumps to ecu.

I am out of options now :-(

any help is really appreciated

 

Hi guys, I don't have time to help you try to diagnose these issues, but I did want to say that if you continue to drive when your engine is blowing smoke, you are very likely damaging it and setting yourselves up to need a replacement or rebuild....
You're also going to destroy your very expensive cats in the process. So, please, for the love of all that is holy, stop driving these poor things until they're fixed